[[quoteright:350:[[Webcomic/KimchiCuddles http://static.tvtropes.org/pmwiki/pub/images/404dramainbed.png]]]]
[[caption-width-right:350:Polyamory can lead to drama in bed.]]

->''"Open relationships are not nearly as socially accepted as they were in the 1960s and 1970s, at the peak of the sexual revolution. But they do work for some couples, provided there's a tremendous amount of trust and commitment."''
-->-- '''Dr. Laura Berman''' and '''Dr. Jennifer Berman''', ''For Women Only: A Revolutionary Guide to Reclaiming Your Sex Life''

Rather than requiring someone to pick one person out of several potential love interests, or have a YourCheatingHeart situation, all parties involved agree to be together and share cooperatively. This typically lacks any drama of the decision itself, but has a different form of drama in how people make arrangements with each other, manage jealousy and households, and deal with the disapproval of society as a whole.

Individuals who identify as polyamorous may consider themselves "{{Ethical Slut}}s". Not all ethical sluts are polyamorous, and not all people in polyamorous relationships have the "ethical slut" attitude. The difference between a polyamorist and a [[ReallyGetsAround swinger]] is that a polyamorous person has broad-spectrum involvement in their partners' lives, including love. Swingers are largely there for the sex, often for the novelty of an unfamiliar partner.

* ExoticExtendedMarriage, when polyamory/non-monogamy is normal, if not ''the'' norm, for a foreign/nonhuman culture rather than a fringe practice.
* MarryThemAll, when a LoveTriangle or LoveDodecahedron is resolved by coming to this conclusion.

If it's just hinted at, it's ThreesomeSubtext. If it's not canon but fans {{ship|pingTropes}} it, see OneTrueThreesome. If it's just sex, not full-on relationships, see ThreeWaySex. If one partner receives preferential treatment over the others, then the former is TopWife and the latter are a SupportingHarem.[[note]]Not every case of SupportingHarem qualifies, though; it '''must''' involve a MarryThemAll resolution.[[/note]]

Not to be confused with [[AdaptiveArmor Poly]]''[[AdaptiveArmor armory]]''. Polygamy is a subtype of polyamory, as it means more than one ''spouse'', while with polyamory, marriage and dating ''both'' count. Though real life polyamorists try to disassociate these two as the word "polygamy" has some… messy implications.

For more details and some RealLife tidbits, visit [[UsefulNotes/ForTheLoveOfMany Useful Notes On Polyamory]]. TruthInTelevision, obviously, though how culturally accepted it is varies wildly depending on the place, time period, and social standing. Currently, polygamy is BannedInChina (plus all Western countries) but still legal in [[{{Qurac}} some parts of Africa and Asia]].



[[folder:Anime & Manga]]
* Used in ''Manga/AnatoliaStory'', crossing with TwinThreesomeFantasy. [[spoiler:Yuri's handmaidens Ryuhi and Shala both like Kail's advisor Kikkuri, and they bed him separately. They both get pregnant. Kikkuri had believed he was sleeping with one of the girls, but instead of "choosing" he marries them both. At the end of the story, the girls have given birth to… twins! (Ryuhi has two boys, Shala has two girls). They all live more or less happily under the same rooftop.]]
* ''Manga/DGrayMan'':
** [[ChivalrousPervert Cross Marian]] may be a practitioner of this. He has many lovers. We met one--Anita, and heard of another, which was her mother. Both seemed to love him, and want to help him. They support the Dark Order just to do something for him. He is apparently a good lover, and he seems chivalrous in general when it comes to women. He hates the Order, and has been hiding from them for 4 years, but stayed because Lenalee asked him to, [[spoiler: which exposed his FatalFlaw]], Earlier he protected Lenalee on the crumbling ark. WordOfGod states he likes "good women." Apparently, he cares for his lovers outside of sex, otherwise whether or not they're good women probably wouldn't matter. And he isn't unethical about it, as WordOfGod lists his dislikes as "dirty bastards." Allen states that Cross lives with, and off of, lovers in different places. So, apparently, it's not just Anita and her mother that care enough to do things for him. Anita and her mom were also prostitutes, but Cross stated the former as a good woman [[spoiler: when he finds out she's been killed.]]
** Also, a scene in Jump SQ seems to hint at this. Allen visits Mother and Ba Ba's house, and he says underneath Cross' bed is filled with things he got from his lovers. We see, in his room in chapter 167, he has at least five pictures on his shelves, possibly pix of some of his lovers. So he apparently hangs on to things his lovers let him have.
* ''Anime/DualParallelTroubleAdventure'': An AlternateUniverse of Tenchi Muyo from the same creator, Kazuki Yosuga likewised ends up with all four of his romantic interests in a 3rd new reality, created by combining the previous 2 parallel worlds. The twist? [[spoiler:It was created by the will of the formerly ClingyJealousGirl Mizuki S. when she realized that Kazuki loved all of them equally.]]
* Rokujo Chikage, ''LightNovel/{{Durarara}}'''s resident EthicalSlut and ChivalrousPervert, is happy to be with any girl that doesn't mind sharing. The series introduces him dating ''eight'' girls at once.
-->'''Girlfriend 1:''' Why are we dating such a playboy again?\\
'''Girlfriend 2:''' Because it's one of our weird hobbies.
* Proposed as a solution in ''Manga/GirlXGirlXBoy'' although it [[spoiler:gets rejected in the end.]]
* In ''LightNovel/HaiyoreNyarkoSan'' Cuuko proposes one between her, Mahiro and Nyarko, after she warms up to Mahiro, suggesting [[HomosexualReproduction "I bear Nyarko's child]], [[MisterSeahorse the boy bears mine."]] Unsurprisingly, neither Nyarko nor Mahiro are really down with this idea.
* ''LightNovel/HighSchoolDXD'' is based around this trope. Initially set up as a traditional HaremSeries, it deviates from the norm because none of the girls care that the others like him too. In fact, several of them actively help the others get closer to Issei, culminating in the rest of the harem helping [[TheHero Issei]] and [[HeroesWantRedheads Rias]] become an OfficialCouple. At least two of them stated they were waiting for this to happen before they went any further with Issei themselves. And for her part, Rias has no problem with polygamy as long as she's [[TopWife number one]].
* ''LightNovel/IfHerFlagBreaks'': Not only do none of the girls ([[EvenTheGuysWantHim and one boy]]) in Souta's harem ever show signs of jealousy, when directly asked who will marry him or bear his children in the future, many of the girls (especially Akane) offer the honor to a girl that they feel would be better suited or would make cuter children. [[spoiler:Even when they're all separated by the destruction of their virtual world at the end, they all rejoin Souta in Quest Dorm in the finale.]]
* Her Royal Majesty Iono from ''Manga/IonoTheFanatics'' somehow manages to be in a romantic relationship with ''[[UpToEleven an entire kingdom]] worth of SchoolgirlLesbians''. And satisfy them all. Unless, of course, she is traveling abroad, in which case her paramours start a civil war, with one fraction believing in her eventual return and the other striving to bring her back by force.
* ''LightNovel/{{Kanokon}}'':
** Done with after the credits in the anime's GeckoEnding--Chizuru wins, and Nozomu is PutOnABus… [[YourPrincessIsInAnotherCastle but wait]], she returns after the credits and they decide to share Kouta. Which [[IronicHell kinda sucks for him]], as both of them are extremely oversexed yōkai (Japanese demons), and he's mostly {{Asexual}}. Of course, he doesn't get a say in the matter.
** It's also done part way through the manga, where after Kouta tells Nozomu he loves Chizuru, she leaves… then immediately comes back and declares herself his lover. Chizuru's reaction is basically "Gah, whatever, I'm still number one." However, while Kouta's opinion is not asked initially (like the anime) he later declares he loves them both and is going to be ''faithful'' to them both and no one else.
* ''Manga/MahouSenseiNegima'':
** It turns out that [[CovertPervert Nodoka]] views this as an acceptable solution to the LoveTriangle between herself, her best friend Yue, and Negi, showing up in [[LotusEaterMachine her ideal world]]. [[spoiler: [[Manga/UQHolder The sequel]] reveals that she and Yue discussed the idea and were both okay with it. However, Negi rejects them both and opts for a monogamous relationship with Chisame, though it takes a number of years for her to come around and marry him]].
** Luna aka Shiori's own ideal world shows that she wouldn't mind having both Negi ''and'' Fate.
* ''LightNovel/MaoyuuMaouYuusha'', while not flat out stated that the three are romantically involved together, the fact that the Light Novels end with The Hero, The Demon Queen and Lady Knight deciding to retire and leave together, with no one else in tow, to live in some faraway place in peace, sure says something, especially since both girls had previously come into terms that they love The Hero.
* ''Manga/MarmaladeBoy'': Jin and Rumi Koishikawa, and Youji and Chiyako Matsura (later Jin and Chiyako Koishikawa, and Youji and Rumi Matsura) seem to hint at this. Swapping spouses is one thing; all moving into the same house together and spending all their free time together… awfully suggestive.
* ''Anime/MobileSuitGundamIronBloodedOrphans'':
** [[SexyManInstantHarem Naze Turbine]] has a CoolStarship, which is ''[[UpToEleven entirely crewed]]'' by [[MarryThemAll his harem]]. All of the women appear to be okay with the arrangement, to the point that children are communally raised. We are shown five very young kids on board the ship, each from different mothers, and it's mentioned that Naze has more, older children back on the space colony he calls home. The second season clears things up a bit, explaining that while Naze did legally marry all the women on his crew, it was more about recruiting talented, capable women and getting them away from the crappy menial jobs they were stuck in thanks to scumbags who looked down on them because of their gender. Naze himself outright says that he actually views the girls more as daughters than wives, and [[spoiler:when Lafter begins showing romantic interest in another man, he's fully supportive of it and glad she's found someone she truly loves.]]
** After staying with the Turbines, Atra gets the idea that maybe she and Kudelia could share Mikazuki instead of competing over him. In season 2, [[spoiler:Atra first confesses to Mika, then gets Kudelia to join their relationship]].
* ''Manga/OnePiece''
** While the series makes no mention of whether polygamy is legal or not, it is at least known that the pirate Big Mom, one of the Four Emperors, has ''46 husbands'', with whom she gave birth to ''85'' children. Given she's both a pirate with enough authority to basically be her own superpower, and quite insane, any legal restriction the World Government has on it matter not to her.
** The world nobles also practice extensive marriage, but given that they can ignore laws it also doesn't suggest if this is legal or not. These relationships are hardly healthy however given that many of the wives are grabbed off the street and dismissed whenever the male world noble grows tired of them.
* ''Anime/{{Pokemon}}'' has Brock [[http://www.youtube.com/watch?v=AHITqvzQDr4 sing a song]] about how much he wants this with Jenny and Joy.
* ''Manga/{{Psyren}}'' has Ageha/Sakurako/[[spoiler:Abyss]].
* ''Manga/RosarioToVampire'', where the entire {{harem|Genre}} wants this situation… except for the [[FirstGirlWins first girl]], who doesn't want to share (though said girl is [[SplitPersonality two for the price of one]] and might count just by herself). The boy hasn't made his views known.
* ''Manga/SayonaraZetsubouSensei'' has a rather complicated example of this. [[spoiler: Nozomu loves the First Girl, Fuura Kafuka. However, it's revealed in the final chapters that she was DeadAllAlong. Her organs, however, went to the girls in Nozomu's class, causing him to see her in his students one at a time. (As his sister Rin puts it, he's in love with her corneas-in Abiru-then her lungs-in Komori-then her heart-in Chiri.) On paper, he's in an endless cycle of marriage and divorce between the girls. In Nozomu's eyes, he's married to Kafuka and Kafuka alone. To outsiders, it looks like this trope, especially since all the girls have children by him (that eerily look like Kafuka).]]
* Chocolat/Carrot/Tira was ''almost'' canon in ''Manga/SorcererHunters'', and some fans still would have preferred that to the manga's actual ending. Then again, Chocolat ''did'' end up with Carrot's kids…
* ''Anime/TenchiMuyo'': Seina slips into this trope at the end via a MarryThemAll resolution, though it still has the feel of the former, and WordOfGod says Tenchi himself fits this trope. In both cases, it helps that they're in line for the throne of Jurai (Tenchi being the Crown Prince), a position that, as far as we can see, traditionally comes with multiple wives (the current one has two). It also helps that the Jurian equivalent of the Queen Mother fancies herself a matchmaker, is a master of ThePlan, and seems to prefer this outcome. WordOfGod shows this also happens between Seina's oldest son and Ryoko and Ayeka's daughters, as well as Seina's second son and Ryo-ohki's three daughters.
* The HighSchoolAU manga of ''Anime/TengenToppaGurrenLagann'' features Simon/Nia/Dark Nia in its ending (Dark Nia in this version is a secondary persona/imaginary friend that Nia created from being denied any friends by her overprotective father).
* The last chapter of ''Manga/ToLoveRu'' hints that this might be a viable option for Rito; at the very least, Lala is enthusiastic about to the point that it seems to be her preferred option. In the sequel, ''To Love-Ru Darkness'', one of the girls tries to open up this route (Lala approves), and is only hindered by Rito's belief in monogamy.
* ''Manga/{{Tsugumomo}}'': The ability to share Kazuya is hinted at multiple times by the girls, especially since some of them are [[BiTheWay bisexual]]. Their main point of contention mostly seems to be who will be the first to "deflower" him and share other intimate "firsts" with him. But beyond that, there's little attempt to hoard him for themselves.
* ''Manga/UmiNoMisaki'' ends with Nagi and his three girls in this agreement. The epilogue chapters show that the four of them are getting along perfectly well despite the oddity of their relationship.

[[folder:Comic Books]]
* In ''ComicBook/DemonKnights'', Jason Blood and Etrigan are two beings who were magically joined together by Merlin, and who are each married to Madame Xanadu. It sort of works because only one or the other can inhabit the human plane of existence at a given time; the one who isn't on the human plane ends up in Hell during that time.
* ''ComicBook/ElfQuest''. Many of the elves end up "lifemating" with two others, and their relationships are generally loving and long-lasting (and in at least three cases, explicitly mentioned as a sane alternative to jealousy and rivalry). Problems tend to arise only with Recognition, a form of "love"/lust based entirely on involuntary instinct. Examples: Leetah/Cutter/Skywise, Skot/Krim/Pike, and Dewshine/Scouter/Tyleet.
* A DC {{Elseworlds}} story, "Franchise/{{Superman}}[=/=]Franchise/WonderWoman: Whom Gods Destroy", written by Chris Claremont, is set in a world where Superman made his first public appearance in the 1930s, when he met Lois Lane. Cut to the present day, where [[BettyAndVeronica Lois Lane and Lana Lang]] are in their seventies and are very close friends. Despite Superman's presence during WWII, the Nazis are still in power in Germany, due in part to the interference of Ares and several other Greek Gods. Another faction of Greek Gods, led by Artemis and Athena, grant Lois and Lana eternal youth and superpowers (Lana becomes the Oracle of Delphi and Lois becomes Wonder Woman; Diana had [[FaceHeelTurn turned traitor and joined the Nazis in the interim]]), and they team with Superman to defeat Ares' faction. [[spoiler: Part of Ares' plan is to separate Clark from Lois and Lana, since their powers somehow bind them together. When Lana explains to Superman, "Ares doesn't want the two of you together," (referring to Clark and Lois), Hecate, the Greek witch-goddess, corrects her, "No, the three of you." By the end of the four-issue arc, Clark, Lois and Lana are happily living together in his Fortress of Solitude (the now young Lois changed her name to Lois Lang) in a polyamorous relationship.]]
* ''Comicbook/TheIncredibleHercules'' establishes that besides being TheCasanova who beds any number of women he can, Hercules has several steady girlfriends all over the world. After his death at the end of the series, Venus and Namora find this out when they visit houses or businesses that Hercules has bought or built himself, each of which houses or employs a woman who loves Hercules and is shattered and heartbroken by his passing.
* In ''ComicBook/LeagueOfExtraordinaryGentlemen Century'', Mina, Allan, and Orlando are in a somewhat complicated polyamorous relationship. It's complicated because Orlando's a GenderBender, and Mina doesn't seem to enjoy his company so much when he's male.
* In the last issue of the ''ComicBook/SecretSix'' ongoing, [[spoiler: Scandal Savage decides she can't choose between her girlfriends and proposes to both of them at once. It's implied that they did marry, as in later stories Knockout reaches for Scandal's hand and whispers "Wife...", and a villain taunted Scandal by threatening to harm her "wives".]]
* ''ComicBook/StrangersInParadise'': [[GirlNextDoor Francine]], [[DoggedNiceGuy David]], [[JerkWithAHeartOfGold Katchoo]], [[TheDitz Cas]][[TheMole ey]], [[{{Jerkass}} Freddie]] and even Tambi all alternate between being friends, enemies, sexual partners and various places in between, and also rotate living with each other as one or more of those options. After [[spoiler:David reveals to Casey and Katchoo that he is dying]], they all (well, most) decide for Katchoo, Casey and David to form a sexual relationship in order to produce a child and because they all do love each other, even though Katchoo only ''really'' loves Francine, David only ''really'' loves Katchoo, and who Casey ''really'' loves is more complicated than even the reader thinks at the time. Once [[spoiler:David dies]] the series settles down into Katchoo-Francine and Casey-Tambi (!?!?!?!?!?), though even then David sticks with both pairs in spirit and via his child with Katchoo.
* At the very end of ''ComicBook/SupermanRedSon'' (an {{Elseworld}}), when [[spoiler:Lex Luthor uses his genius to turn Earth into a utopia]], it's said that the "triple" replaces the "couple" in human relationships.
* [[Myth/NorseMythology The Norns]] in ''Comicbook/TheWickedAndTheDivine'' are in a closed, triadic relationship, with [[CasualKink Urdr/Cassandra submissive to Verdandi and Skuld]].
* A common theme in erotic comic ''ComicBook/XXXenophile'', created by Creator/PhilFoglio, (who later went on to do ''Webcomic/GirlGenius'', which also has an entry on this page).

[[folder:Fan Works]]
* Thanks to Rei's machinations in ''Fanfic/AdviceAndTrust'', Kensuke ends up with ''two'' girlfriends, namely [[spoiler:[[Anime/PuellaMagiMadokaMagica Kyouko Sakura and Sayaka Miki]]]]. His girlfriends are also engaged in [[SchoolgirlLesbians a loving relationship]], and initially tried to use Kensuke as TheBeard to continue it in secret - but upon discovering his compassionate and tolerant personality underneath his geeky demeanor, decided to "share him" together.
** Kensuke is seen engaging on this relationship very amiably despite being teased by both in a regular basis, [[spoiler: as he [[YuriFan smiles sweetly]] upon seeing [[HoYay/PuellaMagiMadokaMagica Sayaka kiss Kyouko briefly]] during Asuka's birthday.]]
** Lately Shinji/Asuka/Rei (better known as the "[[FanNickname Israfel Special]]") is also teased in the fic, though Shinji and Asuka feel they couldn't handle it.
* In ''[[https://www.fanfiction.net/s/11886910/1/Gankona-Unnachgiebig-Unità Gankona, Unnachgiebig, Unità]]'', [[spoiler:Germany, Italy, and Japan ended up in a polyamorous relationship after Germany and Japan agreed to share Italy at Italy's request.]]
* ''Fanfic/DoingItRightThisTime'': After returning to the past, Shinji, Asuka and Rei are so sick of and fed up with angst, pain, misunderstandings and heart-breaks that they -- including Asuka, who had formerly declared, "If I can't have [Shinji] all to myself, then I'd rather not have [Shinji] at all," -- decide the best way to resolve their LoveTriangle is sharing each other.
-->'''Asuka:''' How does someone as naturally clingy and possessive as me successfully practice polyamory, you mean? ''[smirks]'' Easy. I'm clingy and possessive of both of them.
* Poly seems to be a normal state of affairs in the universe of ''Fanfic/OnAClearDayYouCanSeeForever''; that doesn't stop there from being issues of jealousy and insecurity, however. Mamoru is not terribly happy about Usagi's affections for her senshi, especially Rei, but he also knows that he has no right to deny them. For poor Ranma, from another world entirely, the concept of sharing is even harder to deal with.
* The Epilogue of ''[[http://parrot.moments-lost.org/earchive/viewstory.php?sid=3370=0&chapter=1 I Am What I Am]]'' has this, but with a twist. [[spoiler: Xander (who has the memories of his entire life up to his death which he has been using to alter and improve things) is now with Buffy AND Faith and it's heavily implied that all three are sharing the other two (no sex yet, though).]]
* In ''Fanfic/KyonBigDamnHero'', Kyon's uncle [[spoiler:[[VisualNovel/HigurashiWhenTheyCry Keiichi]]]] arranges this with his aunts. Also, [[spoiler:Haruhi]] is working towards this with [[spoiler:Kyon and all females of SOS Brigade]].
* In [[https://www.fanfiction.net/s/5193644/1/Time-Braid "Time Braid"]], [[spoiler:Sakura, Hinata and Naruto eventually get to the point where all three are romantically involved, though Sakura does state that it takes effort to make their relationship work]].
* ''Fanfic/HereInMyArms'' in the ''Manga/RosarioToVampire'' fandom goes this way for the full set of "haremettes".
* In the first chapter of the ''Series/DoctorWho'' fanfic [[http://www.fanfiction.net/s/8435962/1/Come-And-Knock-On-Our-Door "Come And Knock On Our Door"]] by Maribor (the title is an homage to ''Series/ThreesCompany''), Amy attempts to seduce the Doctor. When he protests that she's married, she answers, "We talked. He's on board." The story, along with the sequel [[http://www.fanfiction.net/s/8956484/1/Man-About-The-House "Man About the House"]] explore the Doctor, Amy and Rory in a polyamorous relationship and impending parenthood (the Doctor is able to help Amy conceive despite her inability to have children, as mentioned in "Asylum of the Daleks").
* Maribor's [[http://www.fanfiction.net/s/8619924/1/Epistolary-The-50-Years-Before-We-Were-Born "Epistolary"]], [[spoiler: which follows Amy and Rory's lives after they were stranded in the past after "The Angels Take Manhattan",]] also implies an 11/Amy/Rory relationship existed in flashback scenes.
* In the ''Disney/{{Frozen}}'' fanfic ''Fanfic/SorryAboutTheMess'', this is how the trolls view marriage and relationships in general, with wives having multiple husbands while any one of those husbands may have multiple other wives as well. Kristoff says that for a time he had five fathers and three mothers.
* This is the whole premise behind Fanfic/RelationshipsSeries.
* ''FanFic/RedDeadVirgo'' has Aradia/Sollux/Feferi. [[DidTheyOrDidntThey Maybe.]]
* The ''WesternAnimation/KimPossible'' fanfic [[https://www.fanfiction.net/s/7365434/1/Vacation-from-the-Norm "Vacation From The Norm"]] ends with Kim, Ron and Shego in a triad relationship. At the end of the first book, Kim is in love with both Ron and Shego, who are both in love with Kim and happy to share her. During the course of [[https://www.fanfiction.net/s/8247998/1/Vacation-from-the-Norm-Bk-2-Journey-of-Discovery "Vacation From the Norm Bk. 2: Journey of Discovery"]], Ron admits that he shares Kim's love for Shego, who is slowly coming to fall for Ron as well, making this a true triad.
* [[WesternAnimation/KimPossible Kim, Ron and Shego]] also enter into a poly relationship in Weirdbard's "Trio" series, which crosses over into various horror movie properties. At the end of the first story, [[https://www.fanfiction.net/s/2727998/1/Frequency-of-Evil "Frequency of Evil"]] Kim and Ron confess their love for each other, while Shego realizes she has fallen for Ron. Shego's solution to the problem in the second story, [[https://www.fanfiction.net/s/2761350/1/Trio "Trio"]]? Seduce Kim and convince her of the benefits of a ''ménage a trois'' with Ron.
* All residents of the ''Avengers'' Tower being in a happy poly relationship seems to be popular in fandom.
* Later chapters in the ''Series/{{NCIS}}'' fic [[https://www.fanfiction.net/s/8935062/1/Shards-To-A-Whole "Shards to a Whole"]] explore a growing four-way relationship between Tim and Abby [=McGee=] and their friends Jimmy and Breena Palmer. The growing relationship between the two couples evolves slowly, and the four of them do take in the long-term ramifications of their feelings for each other. Abby for the record [[BiTheWay identifies as bisexual]] while Tim, Jimmy and Breena identify as straight but willingly invoke IfItsYouItsOkay, along with a generous helping of [[GirlOnGirlIsHot Girl On Girl]] and/or GuyOnGuyIsHot.
* In ''Fanfic/PokemonResetBloodlines'', WordOfGod says that [[Anime/{{Pokemon}} Ash]] will eventually have at least six girlfriends. This will, of course, require a lot of CharacterDevelopment and soul-searching for everyone involved.
** Before this point such a relationship appears of four O.C Female characters.
** It's suggested that these kinds of relationships are relatively common among Bloodliners, due to a combination of females greatly outnumbering males and serious FantasticRacism existing between them and baseline humans.
* In ''Fanfic/ACrownOfStars'', it's offhandedly shown that the Empire of Avalon is accepting of polygamous relationships, evidenced by casually referring to one case of two girls and a guy as a "triad", suggesting that it's relatively common. Near the end of the story, Kensuke gets involved in one when two girls he helped save in South America decide to "share" him rather than fight over him, to his dismay and Asuka's unending amusement.
* A major subplot in ''Fanfic/CodeGeassThePreparedRebellion'' is Lelouch slowly but surely getting a harem. He already has both C.C. and Sayoko sharing his bed, with more to come eventually. Considering his father has 108 consorts, it's no surprise that he's not averse to the idea.
** It's later revealed that Britannia has a law that makes it more of an ExoticExtendedMarriage, whether or not the wives and mistresses get along is another thing all together as the Emperor's consorts can attest to.
* In ''Fanfic/RanmaSaotomeChiMaster'', Nabiki is trying to nurture this type of relationship, one where Ranma marries Akane but keeps her as a mistress.
* [[https://www.fanfiction.net/u/2164997/Crossoverpairinglover Crosoverpairinglover]], (author of the aforementioned ''Fanfic/PokemonResetBloodlines'') has this occur in a oneshot of his: [[https://www.fanfiction.net/s/12128915/1/The-Edit-War-for-Ash-s-Freedom-to-not-be-Betrayed The (Edit) War for Ash's Freedom to not be Betrayed]] with Ash and his pre Sun/Moon female companions as a result of said edit war.
* The ''Manga/RanmaOneHalf'' fanfic ''[[https://www.fanfiction.net/s/12151948/1/Anime-Addventure-Masters-Way Master's Way]]'' has Ranma find a mysterious book, which starts a chain of events that results in him getting six girlfriends.
** This is also brought up as a potential solution for the Miyo/Hikaru/Jeremy LoveTriangle, though it's not clear if that's the route that will be taken.
* The ''Literature/HarryPotter''/''Literature/DragonridersOfPern'' {{Crossover}} fic ''Fanfic/TheQueenWhoFellToEarth'' features several trios among the dragon riders, as a result of Pern's mores bleeding through their dragons. This ranges from two people of the same sex loving a person of the other sex and sharing (which happens with Harry, Hermione and an OriginalCharacter Muggle girl) to full trios (Millicent Bulstrode with two boys).
* The [[OfficialCouple Official Triad]] in ''Fanfic/NeonMetathesisEvangelion'' is Asuka/Rei/Shinji. It also features Kensuke/Mana/Kaworu, whose story is detailed in the side-story ''Life During Wartime''.
* In the ''Franchise/CodeGeass'' story ''[[https://www.fanfiction.net/s/12290311/1/The-Black-Emperor The Black Emperor]]'', Lelouch and Milly are in an open relationship, both of them "playing with" pretty girls, sometimes together. They're also open to the idea of having relationships with sexy girls on a more permanent basis, [[spoiler:and as of Chapter 5, they've formed a triad with Kallen]].
* Because of how much mares outnumber stallions in ''WesternAnimation/MyLittlePonyFriendshipIsMagic'', many fan works postulate that polygyny is an accepted and widespread practice in Equestria.
** [[http://www.fimfiction.net/story/314239/never-be-alone Never Be Alone]] has this form between the [[spoiler:Equestria Girlverse CMC, with Apple Bloom and Sweetie Belle inviting Scootaloo into it.]]
** ''FanFic/{{Hands}}'': The LoveTriangle between Andrew, Twilight, and Fluttershy eventually evolves into this, as the girls are willing to share Andrew if it means not fighting over him anymore.
** ''FanFic/{{Xenophilia}}'', whose author [[ShownTheirWork has obviously gone to some trouble to research actual real-life herd behaviour]], suggests that this is actually the norm in Equestria due to the relative rarity of male ponies.
** This is a recurring theme in Fanfic/TheDearSweetieBelleContinuity, apparently common in prior centuries in Equestria, especially among earth ponies, who (according to Celestia) nonetheless led the way in shunning the practice in more recent times. [[spoiler:It's still legal, though, so Luna decides to resolve her LoveTriangle with Shining Armor and Cadance this way. Cheerilee also suggests it to Big Macintosh, who is far less keen on the idea.]]
* In the ''Franchise/{{Transformers}}'' fanfic ''[[https://www.fanfiction.net/s/5955294/1/The-Ultimate-Mate-Hunt The Ultimate Mate Hunt]]'', Starscream ends up bonded to Megatron, Optimus, Soundwave and Skyfire at the same time. In addition, the other four mechs decide that they may as well bond with each other in order to make a full loop bond.
* The ''Star Wars'' prequel fanfic ''Fanfic/QueensGambit'' includes a romantic subplot about Anakin/Padmé/Obi-Wan.
-->'''Padmé''': I know you love me. I know you love Obi-Wan. You don’t have to choose between us. None of us do.\\
'''Anakin''': It doesn’t ''work'' like that!\\
'''Padmé''': Why? Why not? I’m Naboo, it ''does'' work like that for us.
* Happens by accident in the ''Franchise/{{Transformers}}'' fanfic ''[[http://archiveofourown.org/works/12000243/chapters/27152133 Beauty in Thirds]]'' - Megatron only intended to bond with Skywarp, and learned too late that if he bonded with one member of a Seeker trine, he'd automatically be bonded with the other two members as well. The rest of the story revolves around him trying to win the favour of both Thundercracker (not too difficult) and Starscream (EXTREMELY difficult).

[[folder:Films -- Live-Action]]
* Played for laughs in Creator/TheMarxBrothers' ''Theatre/AnimalCrackers'', when Captain Spaulding jokingly proposes to two women at once.
-->'''Mrs. Rittenhouse:''' But that's bigamy.\\
'''Captain Spaulding:''' [[{{Pun}} Yes, and it's big of me too.]] It's big of all of us. Let's be big for a change.
* ''Film/{{Bandits}}'' has both the main characters falling for their hostage turned ally. When she is pressed to chose she deliberately chooses "not to chose," and is last seen happily with both of them in Mexico.
* ''Nearly'' happens in ''Film/BobAndCarolAndTedAndAlice''. Just as it seems like this will happen, with all four of the principals in bed together, they change their minds.
* ''Les Chansons d'Amour'': Julie and Ismaël resolve Ismaël's attraction to his coworker Alice by forming a ménage à trois [[spoiler: which doesn't survive the first act: when Julie dies, Alice and Ismaël go their separate ways.]]
* The play and film ''Film/DesignForLiving'' revolves around the three-way relationship between two (male) best friends who are both in love with the same woman. They try this, but jealousy breaks them up and the woman marries someone else… until she decides that she still loves her boys, and as they want her back, the three of them decide to give it another try.
* In ''Film/{{Dodeskaden}}'', two of the wives in the neighborhood amuse themselves by swapping husbands from time to time. The drunken husbands barely notice.
* ''Film/DodgeballATrueUnderdogStory'' throws in a love triangle in the last 2 minutes--and promptly goes with this solution.
* In the 1999 TV movie ''Literature/JourneyToTheCenterOfTheEarth'', after arriving to the land beneath the crust, the adventurers encounter a village of humans. Their guide [=McNiff=] immediately takes a liking to the local women, who respond to the big man from above. He then sees men glaring at him and finds our they're the women's husbands. Apparently, they practice polygamy. He grins and takes two women to a shack to exchange cultural knowledge. The idea of limiting relationships to only two people seems ridiculous to the locals, one woman asking in disbelief if women from above really like monogamy.
* ''A Home at the End of the World'' has the main characters decide to form a family, [[BittersweetEnding only for it to eventually break down]].
* ''Film/JulesAndJim'' focuses on a three-way pairing, with an eye to determining whether it can possibly last. In and of itself, polyamory is deemed acceptable, but "pioneers must be humble and unselfish," and jealousy results in a murder-suicide.
* The Dutch movie ''Liever Verliefd'' ("Preferably In Love") has the main character marrying both of her love interests at the end.
* A woman and two men try this in ''Film/PaintYourWagon''. It sort of works for a while; one of the men eventually [[spoiler: departs, not so much because of the triangle, but that the area's becoming too civilized for his taste.]]
* In ''Film/ScottPilgrimVsTheWorld'', Wallace Wells, Scott's gay roomate sleeps with Stacey Pilgrim's boyfriend Jimmy and another nameless guy later on. His boyfriend, "Other Scott" does not seem to mind as at one point they're all seen sleeping in the same bed together, as well as Scott.
* In ''Film/VickyCristinaBarcelona'', Juan's ex-girlfriend shows up after Cristina is already living with him. Things go from awkward, to tense, to sexy, back to tense, to [[SubvertedTrope falling apart entirely]].
* Strongly implied at the end of ''Film/{{Viridiana}}''. After LettingHerHairDown, Viridiana, who is obviously very changed by her experiences, enters the bedroom and finds Jorge and his lover Ramona. She sits down at a table with them. Jorge, who has a deck of cards, starts dealing, looks at Viridiana, and says "When I first saw you, I knew that we would end up playing cards."
* Another one from Woody Allen. When Melodie's disapproving mother Marietta shows up in ''Film/WhateverWorks'', [[spoiler:she goes on to date two men that agree to share her.]]
* ''Film/ProfessorMarstonAndTheWonderWomen'' explores the relationship between William Moulton Marston, Elizabeth Marston, and Olive Byrne, and its effect on the creation of the lie detector (which the Marstons invented) and Wonder Woman (which Mr. Marston created and wrote under the pseudonym William Moulton). See Real Life, below.
* ''Film/ShesGottaHaveIt'' revolves around the polyamorous life of the protagonist and its acceptance or not by people around her.

* ''Literature/AnitaBlake'': Anita Blake eventually takes this option with her entire UnwantedHarem.
* Occurs many places throughout ''Literature/TheBible'', making this OlderThanFeudalism at least. Many important figures had multiple wives, such as Jacob in the Literature/BookOfGenesis who marries sisters Leah and Rachel (although the former was thanks to a BedTrick). In the Literature/BooksOfKings, David had eight wives and several concubines, in common with most kings of the time. The champion, however, is probably Solomon, who takes it UpToEleven with 700 wives and 300 concubines! The practice had largely died out by the end of the Old Testament, and in the New Testament, Paul {{defie|d}}s it by teaching (in [[Literature/EpistlesToTimothy 1st Timothy]] and [[Literature/EpistleToTitus Titus]]) that a man should only have one wife.
* ''Literature/ABrothersPrice'' is set in a seriously gender-skewed world, with 5-10 girls born for every boy. The solution for this is for boys to marry all sisters in a family. The hero, of course, goes on on to marry [[spoiler:''all'' of the princesses of the realm]].
* ''Literature/TheColorOfDistance'' has Juna mention her failed "group marriage". In the sequel we see that her brother is in a similar marriage and they are commonplace. Often two people are monogamous within the marriage, but in passing a triad consisting of two brothers and a woman is mentioned. The real purpose in group marriages is a sense of family and community, and sharing child rights.
* ''Literature/TheCompanyNovels'': [[spoiler:Mendoza, Edward, Alec and Nicholas]]
* Maya Banks's ''Colters Family'' series of romance novels are centered around the titular Colter family, in which Holly, the family matriarch, is married to the three Colter brothers. Her sons also continue the poly tradition of being married to the same woman. Oddly enough, her daughter does not get involved in a poly relationship.
* In Jennifer Crusie's ''Crazy For You'', the female protagonist's mother is involved with a best friend as well as a husband.
* ''Literature/CrookedLittleVein'': The main love interest is a polyamorist, much to the protagonist's dismay. Originally, at least.
* It tends to happen in ''Literature/DragonridersOfPern''.
* OlderThanPrint: In the eighth story of the eighth day of Creator/{{Boccaccio}}'s ''Literature/{{Decameron}}'', "Two men keep with one another: the one lies with the other's wife: the other, being ware thereof, manages with the aid of his wife to have the one locked in a chest, upon which he then lies with the wife of him that is locked therein." At the end, they call it even and, decide, along with their wives, to live so that "each of the ladies had two husbands, and each of the husbands two wives."
* ''Literature/EvaLuna'': Male lead Rolf Carlé gets into a relationship like this with two girls that not only are both his lovers, but [[KissingCousins his cousins]] as well. It lasts some years, until Rolf leaves the "colony" they live in and goes to the city; there's no ultra dramatic break-up, and the cousins are later HappilyMarried to local males whereas Rolf becomes an IntrepidReporter and gets involved with Eva, the female lead.
* In ''Literature/{{Existence}}'' it's briefly mentioned that Hacker has two girlfriends and Gerald is in a group marriage.
* In ''Literature/TheExpanse'' polygamous marriages aren't the norm but also aren't considered especially odd. Main character James Holden is the child of just such a marriage, being created from the genetic material of all eight of his parents.
* At the end of the ''Fitz Osborne'' trilogy [[spoiler:Toby and Julia have a loving but nonromantic marriage, and both are involved with Simon. This proves to be an ideal solution for them, as it allows Toby to maintain his relationship with Simon while also fulfilling his duties as king; Simon to father the heirs to the throne of Montmaray (to which he was the rightful, but illegitimate heir; yes, he and Toby found out they were secret cousins after they were sleeping together)[[note]]Toby's sister Sophie sleeps with Simon ''after'' learning that they're secret cousins, so it's not really that big a concern in the book[[/note]]; and Julia to marry on her own terms. The three of them live happily together with their children.]]
* The sci-fi novel ''Forget Yourself'' features polyamory as a major theme, though it is never mentioned by name.
* ''Literature/GaeaTrilogy'': BizarreAlienBiology makes this common practice among the [[OurCentaursAreDifferent Titanides]]. It's common for their reproductive process to involve three or four individuals' genetic contributions, although [[TrulySingleParent one female can self-impregnate]].
* The main theme of the polyamorous comedy romance ''Literature/TheGiddyDeathOfTheGaysAndTheStrangeDemiseOfStraights'', following the love between the characters Dom, Richard, and Caroline. Scenes set in the future show a greater acceptance of nonmonogamous relationships, and even the potential for legal rights.
* ''Literature/HonorHarrington'':
** This is the eventual solution when Honor's SecondLove turns out to be already married. As mentioned above, it takes some pretty extraordinary people to make this kind of thing work, and fortunately they all are: the man is [[spoiler: her former boss, Hamish Alexander, the Earl of White Haven, whose wife Emily is a triplegic who CantHaveSexEver. The whole thing is her idea more than anybody else's, and there's enough LesYay between her and Honor to suggest that, for them, the marriage is not merely a formality]]. In the meanwhile, though, there's a lot of {{wangst}}ing, due to the existing marriage and resulting adultery; not to mention the media circus and political maelstrom that would ensue since all three characters are celebrities.
** Grayson already practices ExoticExtendedMarriage (polygyny, as women outnumber men on the planet by three to one), but it's hinted (by Allison Harrington, Honor's mother) that at least some of the women are bisexual, and that, if not openly encouraged, it is at least quietly tolerated.
* ''Literature/TheHouseOfNight'' has many (sometimes with more than three people) involving Zoey, usually some sort of combination out of Zoey/Erik/Heath/Stark (and sometimes Loren). Zoey/Heath/Stark was a thing for a while.
* This is the eventual resolution to the UnwantedHarem in ''Kharmic Rebound'' [[spoiler:Gerald is forced to MarryThemAll and live as one huge family as punishment for his crimes.]]
* This is the resolution to the love triangle between Eric, Beth, and Korendil in Creator/MercedesLackey's UrbanFantasy ''A Knight of Ghosts and Shadows''. The relationship continues happily throughout the next book, but Eric breaks up with them amicably between books two and three.
* This seems to be pretty common practice in ''Literature/KushielsLegacy'' wherein many people have multiple sexual partners with whom they are in love.
* ''Literature/TheLegendsOfEthshar'': The hero of ''Literature/WithASingleSpell'' falls in love and gets married during his quest to win a princess. The king is still insistent about reducing the headcount at his castle, and his wife is very practical.
* ''Literature/TheMillenniumTrilogy'': There's a situation somewhere between this and FriendsWithBenefits; Mikhael Blomkvist and Erika Berger's inability to stop sleeping with each other led to the failure of his marriage, but Erika's husband doesn't mind her seeing Mikhael, and the two men get on well together. Erika and her husband have experimented with threesomes (though only with other people since Mikhael himself wasn't interested,) and they don't actually live together, but otherwise it works quite similarly to this trope.
* ''Literature/NightfallSeries'': Indira teaches Myra some vampire customs:
-->'''Indira''': Most vampires are polyamorous. It’s not uncommon to be in love with a few at the same time.\\
'''Myra''': Why does everything I learn about vampires involve either blood-drinking or orgies?\\
'''Indira''': It is not either one or the other. The blood-drinking is a part of the orgies.
* Some of Creator/OctaviaButler's novels involve people ending up in this sort of situation, usually because of Bizarre Alien Biology--which the humans may struggle against before finally giving in.
** In the series ''Literature/LilithsBrood'' a family may involve a human male, a human female, an Oankali male, an Oankali female, and an ooloi.
** In ''Literature/{{Fledgling}}'', each vampire keeps a small collection of humans as a family (and a food source).
* ''Literature/OneRoseTrilogy'' takes place in a realm where group marriage is the norm.
* ''Literature/{{Outlander}}'' series: [[spoiler:Lizzie ends up with both Beardsley twins]].
* ''Literature/RealmOfTheElderlings'': Fool told Fitz that he had two fathers and one mother, which was quite common in his land.
* Creator/RobertAHeinlein's works feature this heavily, especially as he got farther into his career, which gives it strong overtones of AuthorAppeal, even though he never commented on whether or not he and his wife Virginia were exclusive. Most of the works in question advance the concept that a truly [[BlitheSpirit free individual]] should not be restricted by cultural taboos in choosing whom or how many to love.
** ''Literature/TheMoonIsAHarshMistress'' features protypical matriarchal group marriages--that is, the woman is the dominant partner and has full discretion as to whom or how many men she marries.
** ''Literature/StrangerInAStrangeLand'' has Mike, a human with [[BlueAndOrangeMorality Martian values]], form an entire quasi-cult around the notion of Free Love. Said novel was widely influential in the counterculture of the American 1960s and arguably predicted it.
** ''Literature/{{Friday}}'' starts with the titular protagonist in a group marriage in New Zealand, although they divorce her after she exposes their racist hypocrisy. She later joins a much healthier group marriage.
** ''Literature/TimeEnoughForLove'' and all subsequent novels in his "Future History" series feature Lazarus Long's increasingly extended family, designed as a group marriage in which individuals are free to come and go as they please but all are mutually responsible for the maintenance of the household and care of the children. The only restriction on who sleeps with whom is genetic compatibility, and not even then if there is no risk of pregnancy.
** In ''Literature/TheNumberOfTheBeast'' and ''Literature/TheCatWhoWalksThroughWalls'', the protagonists of those novels all eventually fall into Lazarus' polyamory through various circumstances including TimeTravel and dimension hopping.
* In ''Literature/SewerGasAndElectric'', the eco-pirate Dufresne is in a polyamorous relationship with an online journalist and her male-model second boyfriend, complete with threesomes. The model is bisexual and has no problem with this, but Dufresne's own lingering insecurities from an Amish upbringing compel him to wrestle his co-husband into submission each time they meet, offsetting his doubts about his own masculinity.
%%* ''Literature/TheShadowSpeaker'': Sarauniya Jaa has two husbands.
* In ''Literature/TheSharingKnife'', polyamory is rare, not surprising given the pre-Industrial setting. However, it's not unheard of among the Lakewalkers. When one of the Otter women realizes her husband is sterile, she is urged to divorce him and take another who can give her children. Out of love for him, she refuses. Instead, she chooses a second husband, and all three of them marry each other. Among the Lakewalkers, marriages are proven by magical wedding bracelets. As each of the threesome has two bracelets proving that they are simultaneously married to two different people, there is nothing anyone else can do. The clan eventually gives up trying to break up the threeway marriage, and the children are considered the offspring of all three parents.
* ''Literature/ASongOfIceAndFire'': The Targaryens have been polygamous on and off throughout their history.
** Aegon the Conqueror started the tradition when he decided to married both Visenya and Rhaenys. He was supposed to marry Visenya but loved Rhaenys, and it was a MarryThemAll solution. Each of them rode one of the three famous Targaryen dragons. Aegon's case is kind of an ExaggeratedTrope version of the idea "behind every great man is a great woman." It's clear that having ''two'' great women behind him is much of the reason he was so successful. Aegon was as least as much of a conqueror as Alexander the Great was in our world, but instead of dying young, he went on to rule his kingdom--and was by all accounts the greatest king Westeros has ever known.
** Other Targaryens (descendants of the conquering triad) also went the poly route… if in very destructive ways that neither Aegon, Visenya nor Rhaenys would have have condoned, thanks to the StupidEvil ways they went about it. Two consenting wives at once? No problem. But Maegor "the Cruel" had three at once, including ''kidnapped'' wives he [[UriahGambit gambitted]] into it after killing a couple of others. Um… recipe for disaster, mate.
** And then Aegon "the Unworthy" was--at least--"just" a FatBastard who ReallyGetsAround and believed in open relationships on his end (just don't dare cheating on ''him''). Just as catastrophic as Maegor, though.
** It has been suggested than Daenerys reinstate the practice Aegon-the-Conqueror style and get herself a pair of husbands to ride her other two dragons.
* Most of the main cast of ''Literature/TheTaleOfTheFive'' series. [[spoiler: Including the dragon. And the '''fire elemental'''.]]
* ''Literature/TheTraitorBaruCormorant'': The eponymous main character has two fathers and one mother; polyamorous relationships were commonly accepted in her homeland before [[TheEmpire the Masquerade]] conquered them. The Duchess Nayauru also has two lovers, though this triad seems to be an outlier in their country.
* In ''Literature/TwentySixSixtySix'', "The one about the critics," Espinoza and Pelletier are HeterosexualLifePartners who are both having casual sex with [[NerdsAreSexy fellow academic]] Liz Norton. Both men both love Norton and want their relationship to end up as this. They have ThreeWaySex once but Norton [[TakeAThirdOption takes a fourth option, so to speak]] [[spoiler:and ends up with their friend Morini.]]
* In the sci-fi ''Literature/{{Uplift}}'' series, some alien species require more than two individuals all mating together in order to reproduce. Among the species with this variety of BizarreAlienBiology are the Gubru (require one female, one blue male, and one yellow male) and the Brma (require an alpha female, a beta female, an alpha male, and a beta male). It's also becoming popular among humans, possibly because of our [[UpliftedAnimal uplift]] of the by no mean monogamous chimps and dolphins. Robert's mother has four husbands for instance.
* Vonda [=McIntyre=] [[AuthorAppeal seems to like this]]:
** In the ''Starfarers'' series, there's at least one married triad (who were previously a ''tetrad'', [[spoiler:and almost became one again,]] but [[spoiler:in both cases]] someone died).
** ''Literature/{{Dreamsnake}}'', it's monogamous characters like Arevin who stand out.
* In ''Literature/WarriorCats'', Smoky lives in a barn with, and is mates with, both Daisy and Floss (who happen to be sisters), and both of them bear his kits. The two she-cats are fine with it, although Daisy feels that he always did like Floss a bit better.
* In ''[[Literature/TheWheelOfTime Wheel of Time]]'' series:
** The main character Rand al'Thor falls in love with three women, who in turn all fall in love with him. Leads to a fair bit of angst until the women decide to share, and put it to Rand as a fait accompli.
** The Aiel people, one of whom is a love interest of Rand's, formalize polygamous marriages as "sister-wives". As women in Aiel society are the ones to propose marriage, they generally decide on this arrangement in advance and are considered to be married to each other as much as to the husband. Although an Aiel marriage could involve multiple husbands, it's not mentioned as something that happens.
* ''Literature/{{Wicked}}'' has Frex/Melena/Turtle Heart. It started with Melena cheating on her husband Frex with Turtle Heart. And then Turtle Heart and Frex fell in love too. Eventually, Melena had their daughter Nessarose, and in not knowing if she was really his or Turtle Heart's, Frex decided on some sub-rational level that she was all of theirs, which is why she always meant more the him than Elpheba.
-->'''Elphaba''': You were in love with him.\\
'''Frex''': We both were, we shared him. Your mother and I did. It was a lifetime ago and I don't know why anymore; I don't think I knew why then. I haven't loved anyone else since your mother died, except of course my children.
* ''Literature/WickedLovely'':
** Leslie, Niall and Irial are all totally cool with their threeway--but not three''some''--relationship.
** To a lesser extent, Ani and Rae seem fine with sharing Devlin as well.

[[folder:Live-Action TV]]
* Subverted in ''Series/AmericanHorrorStoryAsylum'' with Kit, Alma and Grace. [[spoiler:They set up housekeeping together but it does not end well, especially for Grace.]]
* Londo Mollari on ''Series/BabylonFive'' has three wives and a mistress, but it's kind of an aversion since he would gladly toss the polyamory and his three wives out the window, and marry just the mistress he truly loves (his marriages were political). He sums it up rather bluntly:
-->'''Londo:''' Here. Look. These are my three wives: Pestilence, Famine, and Death. Do you think I married them for their personalities? Their personalities could shatter entire planets! Arranged marriages. Every one. But they worked out, they inspired me! Knowing that they were waiting at home for me is what keeps me here--75 light-years away!
* ''Series/BigLove'', being based around Fundamentalist Mormon polygyny, is both an example and a counterexample to this trope, especially since it's depicted that women are often wed as [[VirginityMakesYouStupid young teens]], ergo matches are made outside of the realm of informed adult consent. However, the family of the main characters mostly came together as consenting adults, though Margene revealed in season 5 that she was only 16 when she married Bill. The age of consent in Utah is 18.
* In Series/CableGirls, [[spoiler: Carlota, Sara and Miguel are a trio.]]
* Sister Clarice Willow on ''Series/{{Caprica}}'' is married to multiple men and women, who are all married to each other. This is implied to be unusual but perfectly legal.
* ''Series/DoctorWho'' has invoked this on a few occasions:
** In "The Husbands of River Song" it's revealed that River Song became married to at least two other individuals (albeit one for the sake of a mission) while still considering herself to be married to the Doctor. The Doctor does not appear to be disturbed by this at all.
** The Doctor unambigiously falls in love with Clara Oswald over the course of her time on the show, leading to an ActOfTrueLove scenario covering ''billions'' of years leading to an AnchoredShip at the end of Series 9. In the very next episode (the aforementioned "Husbands of River Song"), we learn this all happened while he was still married to (and, it is strongly indicated still in love with) River Song. Due to the Doctor having undergone a self-inflicted [[spoiler:MindRape that caused him to lose the memory of being in love with Clara, however]], it is unclear whether River is ever made aware of his relationship for Clara.
** Clara isn't immune to this either, as she attempts to balance relationships with both the Doctor and Danny Pink in Series 8, and in Series 9 while (per WordOfGod) enamoured with the Doctor, at some point she also enters into an off-screen love affair of some sort with Jane Austen. Clara's polyamoric tendencies are another ingredient in her becoming a DistaffCounterpart to the Doctor.
** The ability to be polyamorous is considered a defining character trait of Series 1 companion Captain Jack Harkness, who is shown as equally attracted to Rose Tyler and the Ninth Doctor. Although the series never follows this very far, when it is referenced neither Rose nor the Doctor appear too disturbed by it.
* In the ''Series/{{Elementary}}'' episode "All My Exes Live in Essex" Holmes and Watson must solve the murder of a woman who was simultaneously married to two different men. And was also in an earlier 6-way group marriage with three other women and two men, before that one.
* ''Series/TheFollowing'': The rather twisted Emma/Jacob/Paul LoveTriangle seemingly resolves as this in episode 4.
* ''Series/{{Friends}}'':
** Phoebe finds out at the end of the third season that the mother who raised her isn't her biological mother; when she meets her bio mom in Montauk, she tells Phoebe that herself and her parents were "kind of a couple" together.
** In an early arc Chandler is in a relationship with a woman who has two other boyfriends, he finally cuts it off when she gains a fourth.
* In ''{{Series/Gotham}}'', mafia bosses Barbara Kean, Butch Gilzean, and Tabitha Galavan have become this as of mid-late season 3, with Tabitha being the center of the relationship. Although there are no LoveTriangle strains between them, Barbara and Tabitha's personal politics combined with Barbara's thirst for power are putting a strain on their side of the relationship by the end of the season.
* Frank and Claire Underwood from ''Series/HouseOfCardsUS'' are polyamorous and accepting of each other's partners as long as they can keep their relationships discreet and out of the public eye. This also applies to their [[BodyguardCrush bodyguard Edward Meechum]], who is in love with and [[UndyingLoyalty undyingly loyal]] to both Claire and Frank. [[ThreeWaySex The feeling is mutual.]] In season 4, Claire is worried that she'll have a difficult time keeping her relationship with [[HotConsort Tom Yates]] hidden and feels that the timing of their relationship, [[spoiler:so close to the failed assassination attempt on Frank's life,]] is problematic, so she resolves to break up with Tom. Frank on the other hand believes that Tom is good for Claire and that she really loves him. He essentially vetoes her decision which leads to a heartwarming pep talk that reveals his views on polyamory and his long-standing relationship with Claire:
-->'''Frank:''' He should stay on, because he can give you things that I can't. Look, Claire, we've been a great team. But one person--one person cannot give everything to another person. I can't travel with you. I don't keep you warm at night. I don't see you the way he sees you. It's not my permission to give, but you'll do what's right for you. But I want you to know, if you wanted, I know you'll be careful. And I'll be fine. I mean, [[ArcWords if we're gonna go beyond marriage, let's go beyond it]].
* Mac on ''Series/{{JAG}}'' has to defend a polygamist in "Killer Instinct".
* ''Series/TheMagicians2016'': Alice's parents turn out to have a man named Joe as their "third".
* ''Series/NoTomorrow'': Xavier practices this, calling it "ethical non-monogamy". Evie isn't comfortable with it though, and Xavier likes her enough to stay exclusive.
* ''Series/OrangeIsTheNewBlack'': Season 4's [[InnocentBigot Judy King]] is very openly polyamorous. She has a husband, a boyfriend, and had a [[ThreeWaySex brief dalliance]] with [[spoiler:Yoga Jones and Luschek.]]
* ''Series/{{Portlandia}}'': Fred and Carrie briefly simultaneously date their roommate Alexandra. After she breaks up with Carrie, Fred feels uncomfortable dating someone who broke his best friend's heart, and eventually breaks up with Alexandra too.
* One of the victims of the week in ''Series/PushingDaisies'' has four wives. The heroes are pissed about this--not for any moral reason, but because it makes "My wife killed me" a whole lot more complicated than it needs to be.
* ''Series/{{ShesGottaHaveIt}}'': the series revolves around the polyamorous life of the protagonist and its acceptance or not by people around her.
* In a ''Series/{{Sliders}}'' episode, the characters end up in a world where the bikers are raiding oil trucks to convert it to gas for their bikes. Apparently, all cars run on alternative fuels here. Mallory ([[SuspiciouslySimilarSubstitute not Q-ball]]) hooks up with a woman who turns out to be the leader of the local biker gang. One day, he enters her place to find her in bed with two guys (all still clothed, for PG reasons), who she calmly explains are her husbands. Furthermore, she invites him to join them. He refuses and later finds out that his friends knew that polygamy is legal and perfectly acceptable in this world.
* ''Franchise/StarTrek'':
** Dr. Phlox of ''Series/StarTrekEnterprise'' comes from a poly civilization. He has three wives, each of whom has three husbands, who themselves has three wives each. In a way you can say that all the Denobulan are part of one giant marriage group. There's also indication that three ISN'T the limit, since Feezal, who already had three husbands, attempted to seduce Trip. Phlox felt that Trip should have gone for it, indicating that Denobulans also [[FreeLoveFuture lack any concerns about marital fidelity]].
** At least one novel has indicated that group marriage is legal on Earth. (At least two of which were [[AuthorAppeal written by Vonda McIntyre]].)
** On ''[[Series/StarTrekDeepSpaceNine DS9]]'', there's a throwaway reference to a Bolian officer having a wife ''and'' a co-husband.
** In the ''[[Series/StarTrekTheNextGeneration Next Generation]]'' episode "Data's Day", Data mentions that four-person family units are the norm among Andorians. It should be noted that this is also because, according to expanded works, Andorians have four sexes.
* Suggested in ''Series/TooManyCooks'', with Darren and Claire in an embrace being approached by T.L. and Sasha, and immediately turning around and kissing them.
* In ''Series/TheTribe'', Ram made wives out of [[SiblingTriangle sisters Java and Siva]], mostly to show off his own power. When he meets Ebony (the third sister) he want to marry her too, to "complete the set", and she seem receptive to this at first. [[spoiler:When she falls in love with Jay instead he becomes heartbroken for her betrayal.]]
* In ''Weeds'' Andy ends up in a poly relationship with an artist and her husband. Although he ultimately ends it, he does so because the husband is dying and Andy is afraid of death, not because of the arrangement itself. he's "ok with the two-for one deal."
* Jack & Emma & Izzy in the "Polyromantic Comedy" ''Series/YouMeHer''

* "My Girlfriend's Girlfriend" by Type O Negative
* The Patrick Fiori song [[http://www.youtube.com/watch?v=DjVFwiDpo4s "4 mots sur un piano"]]--it's the prettiest song about a triad you'll ever hear.
-->''Vous étiez ma vie comme la nuit et le jour\\
Vous deux, nouez, filiez mon parfait amour\\
Un matin vous m’avez condamnée à choisir\\
Je ne vous aimais qu'à deux\\
Je vous laisse, adieu\\
Choisir serait nous trahir''
* [[http://www.youtube.com/watch?v=CBHVQfpikIc "I just can't see you and me and her without each other…"]]
* Ben Lee has the song "Apple Candy", where the (male) POV desires a three-person relationship:
-->''I know you made a promise\\
and told him he's your lover\\
make me feel the same\\
…I want you and I want him.''
* "Family", "Move to the Country", "Three", "Perils of Poly" by [[http://www.gaiaconsort.com/lyrics.html "Christopher Bingham (Gaia Consort/Bone Poets Orchestra)"]].
* "My Boyfriend's Girlfriend (Isn't Me)" by Must Be Tuesday.
-->''Of all the ways I've ever dated\\
It's never been so complicated\\
The chain can extend to eternity\\
'Cause my boyfriend's girlfriend isn't me''
* "Millionaire Girlfriend" by Music/JonathanCoulton seems to suggest this, since it will be "my beloved and my millionaire girlfriend and I", until the last verse where it's revealed that he's just working to get power of attorney over all her assets.
* The David Crosby song "Triad", most famously recorded by Music/JeffersonAirplane. Notably, contains multiple {{Shout Out}}s to ''Literature/StrangerInAStrangeLand''.
-->''You both stand there\\
Your long hair flowin'\\
Eyes alive\\
Your mind still growin'\\
Sayin' to me:\\
"What can we do now that we both love you?"\\
I love you too\\
I don't really see\\
[[ArmorPiercingQuestion Why can't we go on as three?]]''
* Olivia Newton-John has the song "Culture Shock" where the (female) POV desires a three person relationship:
-->''You gotta know, I didn't plan it, it was the last thing on my mind\\
How can you love two people at the same time? Ooh ooh\\
Now I don't want to lose you, but I can't give him up''\\

* The Creator/NoelCoward play ''Design for Living'' explores every possible combination of playwright Leo, artist Otto, and decorator Gilda before finally having them inform her husband Ernest that his services are no longer required, as the three of them intend to live in what Ernest decries as a "disgusting three-sided erotic hodgepodge."
* In Creator/GilbertAndSullivan's ''Theatre/TrialByJury'', someone proposes that the defendant (in a BreachOfPromiseOfMarriage suit) "marry this lady today, and marry the other tomorrow". That's considered a satisfactory solution until one of the attorneys points out to the judge that such an arrangement would be illegal.

[[folder:Video Games]]
* ''VisualNovel/AceAttorney'': Angel Starr references having multiple boyfriends, even telling the judge that there's a [[DoubleEntendre slot]] open for him.
* You can suggest this as a solution to a LoveTriangle in ''VideoGame/DragonAgeOrigins'' but the more prudish LoveInterest rejects the idea and breaks off the relationship. But there are fan mods that let you have a relationship with more than one LoveInterest, and one of them is outright called Polyamory. If you then [[spoiler:marry Alistair to Anora and make him sleep with Morrigan or marry her yourself]] love polygon gets rather complicated.
* ''VideoGame/DragonQuestVIII'': Morrie, owner of the MonsterArena, is quite clearly in relationships with all four of the bunny girls working there. ''[[KavorkaMan That lucky son of a bitch!]]''
* In the final route of ''VideoGame/DuelSaviorDestiny''[[note]]And also the original Justice, though much more blatantly[[/note]] this seems to be the final solution to the romance. Crea takes center stage, though.
* ''Franchise/TheElderScrolls''
** Dibella, the [[OurGodsAreDifferent Aedric Divine]] Goddess of Beauty who is also associated with the [[LoveGoddess carnal and sexual aspects of love]], holds no limit on the number of lovers one may have. Instead, she demands focus on the quality of the essence of love, not the quantity.
** Mara, the Aedric Divine Goddess of Love, is associated with the familial, matrimonial, and fertility aspects of love. Despite this, depending on the religious tradition in question, she is coupled with several other gods. She's sometimes depicted as ''one'' of Shor's wives, along with Kyne. The old Nord tradition also makes references to her being the handmaiden of Kyne, ''concubine'' of Shor. Other traditions have her variously the wife of Akatosh, Lorkhan, or both. Sometimes the concubine of both. Yokudan tradition has her, as Morwha, as the wife of Ruptga. However, she has [[MultiArmedAndDangerous four arms]] so that she can "grab more husbands".
* In ''Videogame/{{Fallout 4}}'', you can romance multiple companions if you choose to, since WordOfGod is that they don't sweat that sort of stuff in the post-apocalyptic wasteland. The catch is that if any previously-romanced companion is around when you flirt with someone else, you'll lose [[RelationshipValues approval points]] with them, though not enough to jeopardize an existing relationship in itself. And if you've dismissed her to flirt behind her back, Piper Wright uniquely has a scene where you can find her talking with detective Nick Valentine about investigating your infidelity, though this has no effect on your relationship with her.
* Ryudo, Elena and Millenia, from ''VideoGame/GrandiaII'', though Elena and Millenia were, for most of the game, [[SplitPersonality technically the same person]].
* ''VideoGame/JadeEmpire'', allows you to do this if you keep insisting to Dawn Star and Silk Fox that you can't choose just one of them, to the point that [[spoiler:if you do make a choice at the very last time they ask you to decide as opposed to maintaining your indecision, both will break it off with you, not wanting to hurt the other's feelings.]] After the game, though, you end up [[spoiler:with only Silk Fox, Dawn Star going off to do her own thing]]. To make things even more amusing, at some point before the final decision, you might also find out that [[spoiler:[[KissingCousins they're cousins]].]]
* ''VideoGame/MassEffect1'': You can suggest this as a solution to a LoveTriangle, but the more prudish LoveInterest rejects the idea and breaks off the relationship.
* Male {{player character}}s in ''VideoGame/NeverwinterNights: Hordes of the Underdark'' can suggest that [[spoiler:Aribeth]] and Nathyrra share him. ''It actually works''.
* ''VideoGame/OverlordII'' where you collect three mistresses over the course of the game, are allowed to keep them, and chose any one to be your primary one at any point in the game. It's possible to get all of them to "get along" with and without innuendo.
* ''VideoGame/{{Phantasmagoria 2}}'' has bisexual hero Curtis wishing he could run off and live with his girlfriend Jocilyn and his [[spoiler:doomed]] gay coworker Trevor, both of whom are in love with him. At one point Curtis was dating both Jocilyn and his BSDM loving coworker Therese, but only Therese was okay with the idea of their having an open relationship.
* ''VideoGame/QuestForGloryV'': A glitch lets you propose to three love interests and no one objects. Though only one appears as the Hero's consort at the end.
* You can ''try'' it in ''VideoGame/StarWarsTheOldRepublic'', particularly with a male Sith Warrior that's corrupted and romancing Jaesa, but is still [[PetTheDog nice to Vette]]; Jaesa is open-minded on the idea of sharing, but Vette is squicked out. None of the other potential love interests will go for it. Though ''any'' romance option with the Imperial Agent and Vector is going to be a crowd scene since he's tied to [[MindHive a Kilik hive]].
* ''VideoGame/XenobladeChronicles2'': Rex is in love with both Pyra and Mythra. While this is complicated by the fact that they are [[SplitPersonality technically the same person]], he treats them as different people and loves them both equally. [[spoiler:At the end of the game, they are revived in two separate bodies, edging it towards a slightly more normal example]]. [[EvolvingCredits On the title screen after beating the game]], [[spoiler:Rex stands on a plain holding hands with Pyra and Mythra. After beating NewGamePlus, Nia jumps into the picture. She either holds hands with Rex or [[LesYay pushes him out of the way and holds hands with the girls]]]].
* ''VideoGame/WorldOfWarcraft'': Alexstraza, though widowed many times over, ''used'' to have several husband-equivalents at once.

[[folder:Visual Novels]]
* ''VisualNovel/CrossDays'': You can do this in another very hard to get ending with [[spoiler: Makoto, Yuuki, and Kotonoha. Makoto describes it as Kotonoha being the girl he loves most and Yuuki being the boy he loves most. Except Kotonoha doesn't know the all important details. She is seemingly okay knowing she is not Makoto's only lover, happy enough knowing she is girl he loves most, but she wasn't told that "other woman" is actually a boy, and that Makoto loves him equally to her, in a perfect example of FromACertainPointOfView. And if she ever found out she could possibly murder Yuuki with some form of deadly weapon as she does in other ending where she overhears them having sex, and while Makoto is planning on trying to get her some mental help, this is the best solution he can come up with in the meantime.]]
* ''VisualNovel/FateStayNight'': In ''Unlimited Blade Works'' route relationship between Shirou, Rin and Saber is turning this way, with them with them slowly developing strong feeling for each other. And if a player is able to keep Shirou's affection for both girls in balance, then he is rewarded with good ending [[spoiler:where Shirou, Rin and Saber start officially live together as mutual lovers.]]
* In ''VisualNovel/LongLiveTheQueen'', this is one of the possible ways Elodie can pursue a romance with Brin. If Elodie has the opportunity to choose her fiance at the end of the game, Brin will suggest that she marry her brother Banion so that Elodie and Brin can spend more time together as sisters-in-law; Elodie ends up being close to both of them. [[spoiler:And if Brin and Joslyn aren't already entangled with other matters, Brin will even marry him to doubly ensure a connection to Elodie as her ''stepmother''. Elodie is much closer to Brin than to Banion in this scenario, though, but their respective husbands still seem happy with this arrangement.]] Depending on what else happens to all involved characters, there are further variations of whose kids are being raised by whom. Including [[spoiler:the Banion+Elodie and Brin+Joslyn children all being raised together, making them pseudo-siblings on top of everything else]].
* ''VisualNovel/RoseGunsDays'' features what seems to be this between mafia boss Caleb, his underling Miguel and his mistress Amanda. While Miguel and Amanda quite clearly hate each other, the latter is in an official relationship with Caleb and the former has a lot of HoYay moments with him (which remain mere subtext in the VN but are more explictly romantic in the manga). Caleb, on the other hand, shows affection for both.
* One of the (very hard to get) endings in ''VisualNovel/SchoolDays'' has Sekai and Kotonoha do this to the protagonist Itou Makoto.
* The English DatingSim ''Summer Session'' features a three-person relationship as one of the canon endings; indeed [[spoiler:it's impossible to get that particular girl without sharing her with your roommate]]. It's unclear whether the two male characters are actually involved with each other or just sharing the girl in a V.

[[folder:Web Comics]]
* The FlashForward strips in the Space Arc of ''Webcomic/ArthurKingOfTimeAndSpace'' suggest that the Arthur/Guenevere/Lancelot triangle resolves this way in at least one timeline. Other strips hint that Arthur is well aware of the affair between his wife and his best friend in at least some of the other timelines, as well, but studiously ignores it.
* ''Webcomic/CatsNCameras'': Main characters, Jim, Josephine and Sari are in what appears to be casual threesome. Jim and Jo are an established couple. Sari seems to be FriendsWithBenefits to both of them.
* ''Webcomic/{{Fans}}'' has Rikk, Alisin and Rumy become a triple. This arc continued with the marriage surviving some storms to the point where [[spoiler:thanks to alien medtech Alisin is currently carrying a baby Rumy and Rikk conceived.]]
* Sirkka in ''Webcomic/FreakAngels'', who lives with a harem.
* ''Webcomic/GirlGenius'': The Heterodyne Castle seems to prefer this as the ultimate solution for the LoveTriangle between Agatha, Gil, and Tarvek. Comments by the Castle indicate that this was likely a common practice for previous Heterodynes, and plenty of other characters have suggested it too. The HoYay[=/=]FoeYay between Gil and Tarvek doesn't really do much to rule out such a solution.
--> '''Violetta:''' Say--you wanna make a ''bet'' on who she'll pick?\\
'''von Zinzer:''' Sure! But, ''hey''--she's the Heterodyne. Maybe she'll just keep 'em ''both''.
** It's teased in some non-canon spin-offs, too.
---> '''Phil:''' Who thought haveing '''''two boyfriends''''' was a '''''good idea?!'''''\\
''[cue [[CheshireCatGrin Cheshire Cat Grins]] from Agatha, Zeetha and Kaja]''
* The ''Webcomic/{{Insecticomics}}'' has a lot of this, usually in the form of open relationships.
* The short-lived webcomic ''Jake the Rake''.
* ''Webcomic/KimchiCuddles'' has become about philosophizing, but the earlier parts of the comics are about a group of poly friends.
* ''Webcomic/KarinDou4koma'': Ran/Shizuki/Tamaryu, as per Ran and Shizuki's decision to resolve their rivalry over Tamaryu by having Shizuki be Tamaryu's wife, Tamaryu be Ran's wife, and Ran be Shizuki's wife. Ran explicitly says that the three of them are together a monogamous couple. Although Tamaryu isn't happy about the romantic aspect, they do get along quite well. When Eldelita attends a sleepover with them, she feels as awkward as someone invited to play and stay overnight at a newlywed's house.
* Maxine in ''Webcomic/LeftoverSoup'' is part of a ''five''-way. When a second woman entered the relationship she even forcefully reprogrammed her brain into bisexuality just so that she wouldn't be missing out on anything.
* This is the premise of ''Webcomic/{{Niels}}''.
* ''Webcomic/PolyInPictures'' depicts moments in the life of polyamorous, queer and neuroatypical people.
* Angela of ''Webcomic/PunchAnPie'' believes in polyamory, but all this does is turn her into a ClingyJealousGirl who is [[MistakenForCheating paranoid that her girlfriend is cheating on her]] with ''literally everyone she knows''.
* Mentioned in ''Webcomic/QueenOfWands''.
* Evidently a fairly common situation in the [[LoveDodecahedron absurdly complex]] social circles at the university in ''Webcomic/QuestionableContent''.
* ''Webcomic/{{SSDD}}'':
** In the backstory, Richard briefly attempted a threeway with the lesbian couple he roomed with in college, [[http://www.poisonedminds.com/d/20030530.html it didn't work out]].
** In the future arcs, Tessa's [[http://www.poisonedminds.com/d/20100720.html adoptive parents]] have a seemingly healthy open marriage. Which squicks their daughter out to no end.
* In ''Webcomic/StrangetownHereWeCome'', the main trio eventually end up like this with Ripp and Johnny both going out with Ophelia, and [[spoiler:before the fic died it was implied that Johnny and Ripp might start going out as well--Ripp was canonically interested, and Johnny at least had a whole ''lot'' of HoYay on his side.]]
* In ''Webcomic/AlwaysHuman'', Sunati's parents Nisa and Prav are a HappilyMarried couple who also have a boyfriend, Vish.

[[folder:Web Original]]
* Very common in ''Literature/ChakonaSpace''
** The titular [[{{Hermaphrodite}} Chakats]] having a certain saying, "love doesn't divide, it multiplies."
** In addition, Foxtaurs are polygynous due to a 3:1 ratio of vixens to todds and todds are "obligated" to make themselves available for stud duty once every five years.
** Caitians (aliens based on lions) are even worse, with an 8:1 ratio. Each harem usually consists of up to six women.
** Stellar Foxtaurs, having been designed with the best traits of Chakats and Foxtaurs, tend to have similar views towards casual sex. Though mating habits vary with some breeds, Polars don't form permanent relationships while Deserts tend towards triads, and Starwalkers mate as a large group but [[PopulationControl carefully control breeding]].
* ''Series/{{Family}}'', an Internet television show, features a polyamorous triad (V formation).
* Parodied by ''WebVideo/HardlyWorking'' in [[http://www.youtube.com/watch?v=5_l_7TWf_oo "My Two True Loves"]], in which Pat sings about his dream to have this sort of relationship.
-->'''Pat:''' It'll be just you and me! …and her!
* ''Literature/TheJenkinsverse'' has a triad relationship forming between Allison Buehler, Julian Etsicitty, and Xiù Chang as of Deathworlders Chapter 24.
* ''Podcast/MetamorCity'' has the Psi Collective members live in families/cells, with (preferably) one male and several females. This is because they believe that a war with the "mundies" (unpowered humans) is inevitable and that they'll need to prepare by breeding as many psychics as possible, but there aren't many powerful males. At the end of ''Making the Cut'' they even considered [[GenderFlip Gender Flipping]] "surplus" males.
* ''[[http://www.patheos.com/blogs/wwjtd/2012/02/the-polyamory-bear/ The Polyamory Bear]]'', a parody of a “Purity Bear” video.
* Mackenzie in ''Literature/TalesOfMU'' falls into this situation pretty quickly. As things stand, she is the lover of Ian, Steff, and Amaranth, the former two also being Amaranth's lovers (but not with each other as well).
* Bladedancer, Gateway, and Chain Lightning have this in the ''Literature/WhateleyUniverse''.

[[folder:Western Animation]]
* ''WesternAnimation/{{Futurama}}'':
** In the movie ''The Beast with a Billion Backs'', Fry briefly dates a girl named Colleen who is living with her four other boyfriends. The main plot is centered around Yivo, a massive, hermaphroditous alien who starts a relationship with ''[[UpToEleven every organic being in the universe]]''. At the end of the movie, [[spoiler:both relationships end, as Colleen goes back to Yivo's universe with shkler, closing the portal between the universes behind them, and the movie ends with the [[SpoofAesop Aesop]] that "love doesn't share itself with the world".]]
** Old Man Waterfall states that he loves his seven wives, [[BiTheWay and his husband]].
--->'''Crowd:''' BOO!!!
** In "Future Stock", Fry refers to traditional families like "the lesbian coven across the street".
* While the details are scarce since she's a PosthumousCharacter, Rose Quartz of ''WesternAnimation/StevenUniverse'' was in a relationship with [[LadyOfWar Pearl]] and [[GoodParents Greg]] simultaneously. "Mr. Greg" states that she'd had several lovers over the course of history and Pearl didn't mind until Greg came along and got into a deeper relationship with her, and the same episode confirms that she loved them both and saw no reason to choose.
** A Gem known as [[TeamMom Fluorite]] who made her appearance in the fifth season, is consist of six gems. Her dialogue implies ("if we find the right Gem") that the relationship between all of the Gems that make her is romantic. Unlike the Cluster Gems or the Cluster itself, Fluorite embodies the possibility of multiple Gems loving each other enough to fuse willingly, giving them a comfortable new form to act through; Fluorite even mentions a willingness to add another Gem if they are compatible. The Cluster Gems were made by shattering other Gems and forcibly and permanently fusing their remaining shards together with the Cluster being a planet-wide forced fusion, leaving the owners of said Gems in constant and immeasurable pain as they lash out in a desire to be whole again. Given the strong messages of trust and consent in this series, Fluorite serves as a good and healthy example of a polyamorous relationship.
* In a truly ''bizarre'' example, the ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' episode "Hard to Say Anything" has Sweetie Belle pairing up Feather Bangs, who had just lost to Big Mac in a contest to win somepony's love, with the three fangirls who had been following him throughout the episode. It's not even a matter of "Pick one," she just encourages him to go with all three of them, and nopony acknowledges this as being out of the ordinary.

[[folder:Real Life]]
* The Netherland's first married [[http://www.brusselsjournal.com/node/301 trio]]. The guy was married to a wife and they both registered a partnership with the second woman, who is a partner, but not legally a wife.
* Thai antiques dealer Thao Wichai [[http://news.asiantown.net/r/14012/lucky-thai-man-marries-pretty-twin-sisters married]] the [[TwinThreesomeFantasy identical twin]] [[ChildhoodFriendRomance girls-next-door]] from his childhood hometown.
* Creator/MishaCollins (Castiel on ''Series/{{Supernatural}}'') had a threesome relationship with his wife and another woman for some time, as [[http://www.amazon.com/Threesome-Handbook-Practical-Guide-Sleeping/dp/B0027NUX0A/ref=sr_1_1?ie=UTF8&qid=1315510414&sr=8-1 explained in her book]]. She describes how a night of cosmos with a friend led to them all in bed together, which led to her later realizing that she had fallen in love with her friend, while still remaining in love with her husband, and that both of them loved each other and her. [[ThePowerOfLove It all worked out in the end.]]
* William Moulton Marston (creator of the lie detector and, as "Charles Moulton", Franchise/WonderWoman) lived this with his wife Elizabeth and Olive Byrne… the relationship was so stable that the two women continued it after his death and until Olive's about forty years later.
* In September 2012, three people were married to each other [[http://content.usatoday.com/communities/ondeadline/post/2012/09/three-way-civil-union-in-brazil-sparks-controversy/1#.UHNvP449igw in Brazil.]]
* As stated elsewhere on the wiki, [[http://www.independent.co.uk/news/world/africa/the-big-question-whats-the-history-of-polygamy-and-how-serious-a-problem-is-it-in-africa-1858858.html it has been reported by]] the news-magazine ''The Independent'', "polygamy is a right enshrined in South Africa's constitution." South African leader Jacob Zuma is a prominent example. In 2010, he married his fifth wife in a traditional ceremony at his remote homestead. In terms of history, the news-magazine also stated, "In 1998, the University of Wisconsin surveyed more than a thousand societies. Of these just 186 were monogamous. Some 453 had occasional polygyny and in 588 more it was quite common. Just four featured polyandry. Some anthropologists believe that polygamy has been the norm through human history. In 2003, New Scientist magazine suggested that, until 10,000 years ago, most children had been sired by comparatively few men. Variations in DNA, it said, showed that the distribution of X chromosomes suggested that a few men seem to have had greater input into the gene pool than the rest. By contrast most women seemed to get to pass on their genes. Humans, like their primate forefathers, it said, were at least "mildly polygynous"."
* The HBO documentary ''Cat Dancers'' examines the tragic lives of Ron Holiday, Joy Holiday and Chuck Lizza, a trio of big-cat performers who preceded Siegfried and Roy and were a romantic threesome. Their partnership ended after a tiger mauled and killed both Holiday and Lizza.
* In 2011, Creator/CharlieSheen was living with a porn actress Bree Olson and a model Natalie Kenly.
* Averted by [[UsefulNotes/OlympicGames Olympic skier]] Suzy Chaffee (she never married) who explains that if she were to marry, it would have been an open marriage:
-->"Marriage is only possible for me if it's an open marriage. A building situation where each helps the other grow. I've been dating younger men because they still have that spontaneity and creativity. But I haven't found anyone to have an open marriage with."
* British actor Sir Creator/MichaelRedgrave, father of Creator/VanessaRedgrave, was known for this. Both Sir Michael and his wife, Lady Redgrave, kept lovers with each other's knowledge and consent. Some of these lovers ended up living with the family for some time. Sir Michael and his wife remained HappilyMarried until his death.