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[[quoteright:300:[[WesternAnimation/{{Ben 10}} http://static.tvtropes.org/pmwiki/pub/images/boldlycoming.png]]]]
[[caption-width-right:300:It's pretty easy, going green.]]
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->''"Humans are disgusting. We'll have sex with anything. Every day, an Earth doctor pulls an octopus or a light bulb out of someone that was put in there on purpose. Captain Kirk boned things that didn't even have holes until he met them. And this article itself is probably next to an ad featuring a flashlight that you can fuck. Seriously, come visit, aliens. See what happens."''
-->-- '''Creator/{{Seanbaby}}''', [[http://www.cracked.com/blog/5-movies-we-hope-any-potential-alien-invaders-have-seen/#ixzz33RAdJHkB "5 Movies Aliens Should Watch Before Trying to Invade Earth"]]

The [[Series/StarTrekTheOriginalSeries Captain Kirk]] approach[[note]]Though Kirk's reputation in this regard is overstated -- see the ''Franchise/StarTrek'' example for details[[/note]] to FirstContact; namely, to have sex with a GreenSkinnedSpaceBabe. Of course, questions of BizarreAlienBiology are never raised beforehand, such as whether the species in question has [[MermaidProblem compatible genitalia]] or if its bodily fluids are [[Franchise/{{Alien}} caustic to human flesh]] (or vice-versa).

Inverse of MarsNeedsWomen and a subtrope of InterspeciesRomance. Contrast HumanMomNonhumanDad. See also AnalProbing for when the aliens do this to us.



[[folder:Comic Books]]
* The ''ComicBook/XXXenophile'' series is full of these.
* ''ComicBook/XMen'':
** Professor X falls in love with Shi'ar Empress Lilandra during the Phoenix Saga and becomes her consort. While their respective duties kept them from truly being together, she would still send him care packages in the form of technology upgrades for the mansion.
** Dazzler of the X-Men married extra-dimensional alien Longshot, who has since their divorce gone on to make BoldlyComing a way of life.
* The Franchise/MarvelUniverse is full of these things. Captain Mar-Vell has at least three children, none of his own species, for instance.
* ''ComicBook/{{Empowered}}'': Not one, not two, but three of the Superhomeys obtained their powers from sex with non-humans (one a robot!). In fact, they met in a support group for it. One of them gained his powers through an alien STD.
* ''Franchise/GreenLantern'': Every single major love interest that John Stewart has ever had was an alien. He has been married to the red/magenta Korugaran Katma Tui and dated the blue Baraquan Merayn Dethalis.
* Both Franchise/{{Superman}} and ComicBook/{{Supergirl}} have been known to have interspecies relationships with humans and other alien races (of course, they're pretty much out of options unless they're wanting to go the incest route). Superman has gotten several children with -usually- ComicBook/LoisLane in the mainstream continuity and alternate universes. In ''ComicBook/KingdomCome'' it's speculated that a blonde-haired, green-skinned alien woman wearing a "S"-ChestInsignia and related to [[ComicBook/{{Legion Of Super-Heroes}} Brainiac 5]] is Supergirl's daughter.
* ''ComicBook/IncredibleHulk'': Two of the Hulk's three wives have been aliens.
* Lampshaded in ''ComicBook/LesMondesDAldebaran''. As Alexa notes, [[spoiler:Kim encounters a humanoid alien from another galaxy... and one of the first things they do is have sex.]]
* ''ComicBook/TechJacket'': Subverted, when the protagonist Zack Thompson and his Geldarian love interest Princess Lin start getting closer they are foiled by an unspecified incompatibility of genitalia.

[[folder: Fan Works]]
* In ''ComicBook/PowerGirl'' fanfic ''Fanfic/AForceOfFour'', Power Girl has a rather passionate relationship with human Andrew Vinson. One of her ''ComicBook/InfinityInc'' teammates thinks Kara has gotten more human lovers previously.
* In ''Series/TheFlash2014''/''Series/Supergirl2015'' crossover ''Fanfic/CallMeKara'', Kryptonian [[ComicBook/{{Supergirl}} Kara Danvers]] and human [[Franchise/TheFlash Barry Allen]] get together and have a daughter.
* In the start of ''ComicBook/{{Supergirl}}'' fic ''Fanfic/HellsisterTrilogy'', Clark Kent and Lois Lane get married. Their relationship is very... Spirited.
* In ''Fanfic/LastChildOfKrypton'', Shinji -Kryptonian- and Asuka -Amazon- get together. At the end of the rewrite, Asuka's gotten pregnant.
* In ''Franchise/{{Superman}}'' story ''Fanfic/SupermanOf2499TheGreatConfrontation'', Superman and ComicBook/{{Supergirl}} had offspring with humans, which the main characters are descendants of.
* In ''Fanfic/SOE2LoneHeirOfKrypton'', Asuka -Kryptonian- and Shinji -human- get into a relationship.
* Inverted in ''FanFic/WithThisRing'' the Martian Manwomanhunter, J'onn J'aarkn loves having sex with humans. So much, that the former biology teacher made a career out of it as an adult film star. Although to be noted Martians and Humans don't look anything alike and Martians are rather monstrous looking. J'aarkin even notes how Humans appeal to him differently than other Martians.
* Non-consensual version in the ''Franchise/StarWars'' fic ''[[https://m.fanfiction.net/s/2696712/1/Important-Information Important Information''.]] Han Solo is captured by a group of imperials and endures several days of brutal torture, but stubbornly refuses to break. His captor is of a species known for using its sexuality as a weapon, and when she sees that torturing Han isn't working, she begins repeatedly raping him. He struggles with the same shame, anger, and humiliation that many real victims do, and his road to recovery is a long one.
* ''Fanfic/AChangedWorld'' has Kanril Eleya, a Bajoran, make a wisecrack about [[Series/StarTrekTheOriginalSeries James T. Kirk]]'s reputation for this: apparently Bones had to create a cure for banta fever after Kirk's first contact with her species.
-->''(Reshek Gaarra, Bajoran, nearly falls over laughing.)''\\
'''Birail Riyannis:''' I'm ... missing something funny. Wait, is banta fever--\\
'''Eleya:''' [[DontExplainTheJoke An STD? Yes it is.]] ''(Biri starts giggling.)''

[[folder:Films -- Live-Action]]
* ''Film/GalaxyQuest'':
** When the engineer attracts an attractive female alien. Of course, her true form isn't a {{human alien|s}} or {{rubber forehead alien|s}}, but a be-tentacled {{starfish alien|s}}
** And [[LampshadeHanging lampshaded]] early in the movie as the "crew" chastises Jason Nesmith for his character (Captain Taggart) doing exactly what James Kirk did in his own show. Although it wasn't made clear if it was his character... or him, it pretty heavily implies that Nesmith is sleeping with the actresses playing the green-skinned space babes. Whether his character is also sleeping with the green-skinned space babes is sort of irrelevant at that moment.
** In a deleted scene, two of Seras's goons hit on Gwen. She [[IHaveBoobsYouMustObey unzips the top of her suit]] (that's why it's open for the rest of the movies)... [[OffscreenMomentOfAwesome and then squashes them with a blast door]].
* In ''Film/GuardiansOfTheGalaxyVol2'', Ego admits to having sent avatars of himself throughout the universe to bang at least one woman from every alien species he learns of. And he has slideshows on his own planet ([[GeniusLoci himself]]) to prove it.
* ''Film/StarTrek'' (2009):
** As a nod to the original series, Kirk attempts this with a GreenSkinnedSpaceBabe but is interrupted by Uhura coming into the room.
** The sequel, ''[[Film/StarTrekIntoDarkness Into Darkness]]'', has him in bed with Caitian (cat people) twins. What a stud.[[note]]Admittedly they're ''radically'' toned-down [[http://memory-alpha.wikia.com/wiki/Caitian Caitians]]- the twins are basically human women with some minor makeup, pointy ears and a tail, while the first Caitian in ''Star Trek,'' [[http://memory-alpha.wikia.com/wiki/M%27Ress Lieutenant M'Ress]], was a famous early icon of the UsefulNotes/FurryFandom, and a similarly radical design was used for their appearances in the original movies.[[/note]]
* ''Film/{{Barbarella}}'': The pretty blonde envoy of an Earth that left behind such outdated concepts like violence or physical sex, gets used to both rather quickly after being introduced to them on a more... uhm, anarchic planet. She doesn't decline to try other things too. In one memorable scene, [[TheDragon Durand-Durand]] tries to [[OutWithABang kill her]] with his [[http://www.youtube.com/watch?v=ye5Jo1I4XXc orgasm machine]], but she [[TooKinkyToTorture overloads it]].
* Interspecies prostitution is mentioned in ''Film/{{District 9}}''... with aliens who look like broadly-humanoid shellfish. The protagonist is falsely accused of having contracted an alien STD.
* Early into ''Film/ClerksII'', in Jay and Silent Bob's first scene, Jay talks about this.
* Before ''Film/AlienResurrection'' was released in theaters, there were rumors of a sex scene between Ripley and an alien. Sigourney Weaver, when reached for comment, said "No. That's ''Alien 5''." There was however one scene of Ripley being carried by an Alien that played with the subtext. The studio wanted to cut it because of the implications, but Weaver refused.
* In ''Film/MenInBlackII'', an entire subsection of the plot focuses on [[spoiler:J discovering that Lara is a Zarthan yet still being in love with her]]. It is also heavily implied that [[spoiler:K had a fling with her mother]]. The series as a whole seems to enjoy playing with these ideas.
* Jake in ''Film/{{Avatar}}''. Justified, considering the fact that one, it took quite some time to get to ''that'' particular point, and two, he was in his Na'vi body.
* Implied to have happened between two nebbishy humans and two female ''Film/KillerKlownsFromOuterSpace.''
* Parodied in ''Film/MyStepmotherIsAnAlien'' with Celeste, who is a gorgeous HumanAlien, arriving to Earth to investigate the source of the signal that has damaged her planet. Her race is extremely logical and pragmatic, having gotten rid of emotions long ago. She starts dating the scientist, who has sent the signal, and, eventually, things lead into the bedroom. The problem? She has no idea what sex is. When she asks her [[ItMakesSenseInContext talking purse]], the purse looks up the term in the dictionary, but the appropriate definition has been redacted. The purse then finds some "[[TheInternetIsForPorn instructional videos]]" (Celeste comments that this Debbie is a busy woman), horrifying the alien female. She resolves to go through with it for the mission and is surprised to find it very pleasurable, asking her partner why they're only doing this now instead of all along. At the end of the film, after she ends up marrying him, her brother-in-law ends up leaving on the spaceship sent to pick her up in order to teach the aliens about human emotions. Given that the all-female crew of the ship is extremely attractive, the guy will have a lot of fun teaching them about this trope.

* ''Literature/{{Ringworld}}'': The common method of demonstrating your peaceful intentions with whomever you happen to run across is to have sex with them, also known as Rishathra. Made easier on a world where just about every race encountered is a far-evolved subspecies of humankind. Also used as birth control since the various species are no longer closely enough related to produce children. The first people they meet in the second novel reveal they're incapable of Rishathra. Both Louis and Teela end up doing it with Ringworlders. One of the reasons Halrloprillalar wants to leave Ringworld and go to Earth with Louis is because she thinks that humans know very little about sex (she's a professionally-trained ship's whore).
* ''Literature/JohnCarterOfMars'': John Carter and the title character of Creator/EdgarRiceBurroughs's ''A Princess of Mars''. Of course the Martians are divided into monstrous four-armed Green Martians and heavily-tanned-human Red Martians. Guess which one the Princess is! (Although she does still ''lay eggs'', raising some unanswered biological questions...)
* Inverted in Octavia Butler's ''Literature/{{Xenogenesis}}'' series, where it's [[http://en.wikipedia.org/wiki/Oankali the aliens]] that want to crossbreed with the humans and every other race they come across. Given that they're all passive-aggressive tentacle-covered anemone-like things, this takes some work.
* Deconstructed in James Tiptree, Jr's story, ''And I Awoke and Found Me Here on the Cold Hill's Side'' as just a trashy form of sex tourism that only perverted aliens indulge in, as part of [[DoesThisRemindYouOfAnything their exploitation of Earth for its resources]].
* Used in Erich von Daniken's nominally nonfiction ''Chariots of the Gods'' to argue that BoldlyComing is obviously the first thing we'd be doing if we were traveling to unknown planets. The AncientAstronauts just thought of it first.
* Subverted in ''The Gods of Xuma'', where the human explorers discover, with some frustration, that those good-looking humanoid aliens aren't "mechanically" compatible.
* ''Literature/FoundationAndEarth'': Technically Golan Trevize, except that all planets are inhabited by humans. Though if you think about the breadth of cultural and political differences between the humans on the various Foundation worlds, the trope probably does hold.
-->'''Golan:''' Erotomaniac? Come, Bliss. Twice on this entire trip. Twice!\\
'''Bliss:''' We were only on two worlds that had functioning human females on them. Two out of two, and we had only been a few hours on each.
* This trope is definitely OlderThanFeudalism; in Lucian's ''Literature/TrueHistory'', some of the narrator's traveling companions have sex with tree-women on a remote island, and end up stuck to them.
* Not uncommon in Creator/LSpragueDeCamp's ''Literature/ViagensInterplanetarias'' setting, which was deliberately constructed to allow PlanetaryRomance type stories with somewhat harder science. In ''Literature/TheHostageOfZir'', one of the characters comments that Literature/TheBible forbids fornication, sex with a human you're not married to, and bestiality, sex with a dumb animal, but it says not a word about fun with a GreenSkinnedSpaceBabe on the planet Zarathustra.
* Played with in Creator/AlanDeanFoster's ''Literature/HumanxCommonwealth'' series, novel ''Bloodhype'', in which the [[ReallyGetsAround rather promiscuous]] Kitten Kai-Sung has some fun {{squick}}ing out her companions by describing in some detail the ways to accomplish this with various sentient species.
* In Creator/MikeResnick's ''The Outpost'', MagnificentBastard Hurricane Smith, one of the galaxy's top bounty hunters, has this trope has his main passion in life. He's already had five ex/late-wives, all different alien species, as he finds human women to "all look the same". After he and his fellow bounty hunters help save the galactic human Democracy from a genocidal alien invasion, he is last seen in romantic pursuit of a ''sentient spaceship'' (with female A.I.), as he rebounds from the death-in-battle of his last wife, an insectoid shapeshifter.
* ''Literature/SisterAlice'' has Lyman Chamberlain, who ReallyGetsAround with the huge variety of HumanSubspecies residing on Earth. The protagonist, Ord, recalls stumbles on him trying to get it on with a [[SapientCetaceans cetacean-esque]] human adapted for deep-sea life.
* In Creator/PiersAnthony's ''Literature/{{Cluster}}'' series, powerful Ancient structures are often activated by creatures with strong Kirlian auras having sex in or on them.
* Citizens of ''Literature/TheCulture'' are [[DesignerBabies genofixed]] to be genetically compatible with most humanoid species. Their genitals are also modified for increased ability to sustain a climax, which leads to all sorts of rumours and envy among other civilizations. Having a dedicated gland for secreting all kinds of mind-altering substances for personal use also helps to get into the mood.
* ''{{Literature/Animorphs}}'' has a variation. Tobias's parents were a human named Loren and an Andalite named Elfangor. However, the variation is that Elfangor was in human morph at the time, so they were able to have sex the usual human way.
* Scott Adams pointed out the inherent issues with this in ''[[ComicStrip/{{Dilbert}} The Dilbert Future]]''.
-->'''Me:''' May I touch that?\\
'''Alien:''' That is not an erogenous zone. It is a separate corporeal being that has been attached to my body for six hundred years.\\
'''Me:''' It's cute. I wonder if it would let me have sex with it.\\
'''Alien:''' That's exactly what I said six hundred years ago.
* Deconstructed in ''[[http://clarkesworldmagazine.com/johnson_10_09/ Spar]]'', a 2009 short story by Kij Johnson. After the destruction of her spacecraft, a human woman is trapped in a lifeboat with a StarfishAlien survivor, and they have {{squick}}-inducing sex simply because there's nothing else to do. Worse, she has no means of communicating with the alien, so never discovers if the act has any meaning for it; or even if she's having sex with a sentient alien at all and not just their equivalent of the houseplant.

[[folder:Live-Action TV]]
* ''Franchise/StarTrek'':
** Averted by ''Series/StarTrekTheOriginalSeries''. While Captain Kirk [[GirlOfTheWeek fell in love with a new person weekly]], and there were quite a lot of interspecies kisses, the writers only made it clear he'd had sex on two occasions: once, a native wife became pregnant, and once the show returned from commercial to find a woman brushing her hair in his room while he put his boots back on. There are numerous examples of interspecies reproduction (Spock being the most famous example) throughout the franchise, however, so apparently quite a few individuals boldly came.
** From the rarely-heard lyrics to the original ''Star Trek'' theme:
-->''Beyond the brim of the star light,\\
My love is wandering in star flight.\\
I know he'll find in star-clustered reaches,\\
Love, strange love a star-woman teaches.''
** In ''Series/StarTrekTheNextGeneration'', this practically seemed to be a part of Commander Riker's official job description as First Officer...
*** In the episode "[[Recap/StarTrekTheNextGenerationS1E13AngelOne Angel One]]", Riker dresses up in chest-baring native garb and goes off to score with the head-of-state of the titular planet, claiming it is part of the "diplomatic" aspect of their mission.
*** In the episode "[[Recap/StarTrekTheNextGenerationS4E15FirstContact First Contact]]", Riker gets an... ahem, offer to help him escape a hospital facility from a nurse in exchange for wild alien sex. According to Word of God, this is intended as a parody of Trek fandom.[[note]]Highly questionable that being blackmailed into sex would have been played as a comedy situation if it had been Dr Crusher or Deanna Troi, though[[/note]]
--->'''Riker:''' The things I do for Starfleet.
*** Again in the episode "[[Recap/StarTrekTheNextGenerationS2E8AMatterOfHonor A Matter of Honor]]". Participating in a officer exchange program, Riker signed on to a Klingon vessel, the crew of which subjects him to a rather unusual SecretTest: seeing how he reacts to two female shipmates openly flirting with him. (He passes.)
--->'''Klingon Officer:''' They want to know how you would endure.\\
'''Riker:''' Endure what?\\
'''Klingon Officer:''' Them.\\
(''Riker gives the females an appraising look'')\\
'''Riker:''' One, or both?\\
(''The Klingons burst out laughing'')
*** In "[[Recap/StarTrekTheNextGenerationS5E17TheOutcast The Outcast]]", Riker almost boldly goes where even James T. Kirk had never gone before, entering into whirlwind romance with an androgynous alien.
** ''Series/StarTrekDeepSpaceNine'':
*** Chief O'Brien was forced to work alongside a pompous Cardassian engineer. The two bicker and bicker and bicker until, finally, the female engineer comes on to O'Brien and drops an anvil of a pick-up line on him: "I'm ''very'' fertile." Apparently, Cardassian women are turned on by argumentative males.
*** Jadzia Dax was also into a number of men of other species. We have Julian (human), Worf (Klingon), Morn (Lurian), Captain Boday (Gallamite), and Deral (Midianite). [[ReallyGetsAround And those are just the ones mentioned.]]
** ''Series/StarTrekVoyager'':
*** A major plot point of Season One is a disguised Cardassian agent who sleeps her way to the top of Chakotay's ranks. Even her disguise (Bajoran) was a non-human species.
*** In "[[Recap/StarTrekVoyagerS5E16TheDisease The Disease]]", Harry Kim falls for an alien babe and ends up catching something (and no, it's not [[SpaceX Space]] [[TheDiseaseThatShallNotBeNamed Clap]]). Turns out there are Starfleet regulations that say you've got to clear this with your ship's doctor first. Given the popular view of Captain Kirk this led to fan accusations of SeriesContinuityError, though it could easily be justified as the regulation having been made as a result of those Original Series crews shagging their way across the galaxy, filling it with HumanAliens.
*** In "Fair Haven", the Doctor mentions that a ship's captain's romantic opportunities are traditionally limited to "the occasional dalliance with a passing alien," casting Captain Janeway's holographic lover in a favorable light.
* ''Series/{{Smallville}}''. Technically when anyone had sex with Clark, Zod, or any other Kryptonians.
* ''Series/TheBigBangTheory'' pointed out the ludicrousness of this trope:
-->'''Raj:''' No alien lady ever said "[[BizarreAlienBiology get your thing out of my nose]]".
* ''Series/DoctorWho'':
** It's established that by Capt. Jack Harkness' time (the 51st century) [[FetishFuelFuture this is humanity's attitude]] to space exploration. Of course, they're also [[EveryoneIsBi more flexible]] about the [[FreeLoveFuture genders involved.]]
** The Classic series had its examples of companions using time and space to shag various historical people and aliens, too -- Barbara was (by WordOfGod) banging the [[InhumanlyBeautifulRace Thal]] Alydon offscreen in "The Daleks", and a possible reading of the scene at the end of "The Massacre" where Steven theorises that Dodo is a descendent of Anne Chaplet is that he's also theorising that [[FridgeBrilliance he is one of her ancestors]]....
* ''Series/{{Battlestar Galactica|2003}}'':
** It has this in the series finale. Upon finding [[spoiler:[[HumanAliens human natives]] on the planet Kara led them to]], the first thing Gaius Baltar talks about is their genetic compatibility with the Colonials. Adama does not let this go without a LampshadeHanging at Baltar's expense.
** Speaking of ''Battlestar Galactica'', are there any characters on that show that ''didn't'' boldly come? [[spoiler:Gaius did anything with a vagina and a pulse, Chief Tyrol married Callie, Helo nailed Boomer, the guy that Starbuck married eventually turned out to be a Cylon, Tigh's wife was sometimes accused of being a slut... hell, even Admiral Cain (!) got some robot GirlsLove in ''Razor'']].
** Ladies and gentlemen, I present the [[http://www.battlestargalactica-wiki.com/page/Battlestar+Galactica+Frakmap Frakmap]]
* ''Series/StargateAtlantis'':
** John Sheppard has a reputation for this, usually involving collective eye-rolling by the rest of the characters. In the episode "Sanctuary", Rodney accuses him of [[LampshadeHanging "the Captain Kirk routine"]] of "romancing the alien priestess", and calls it "very [[Series/StarTrekTheOriginalSeries 1967]]".
-->'''[=McKay=]:''' (''channelling his inner [[TheMcCoy McCoy]], no doubt'') Oh my God, he ''is'' Kirk.
** Although, when you watch more closely, it becomes obvious that he's rarely interested in anything beyond flirting and nine times out of ten he isn't the one who initiates things. Sure, he gets hit on ''a lot'', but when you count it up over five seasons he only went as far as kissing ''four'' women and there's little evidence that he actually slept with any of these women in question. (In one case an alien princess strips for him and his reaction is a very bewildered "I did not see this coming" which is as far from BoldlyComing as you can get.) [[spoiler: In fact by the end of the series he's the only major character ''not'' with someone.]] So this is more of an InformedAttribute than an actual character trait.
* ''Series/StargateSG1'':
** Jack O'Neill and Daniel Jackson both had a few off-world lovers on ''Series/StargateSG1''. Note that examples from the Franchise/StargateVerse are more {{justified|Trope}} than in many fictional works, since almost all aliens in the series are TransplantedHumans.
--->'''Col. O'Neill:''' Daniel, you dog, you keep this up, you'll have a girl on every planet.
** And the truly alien beings (Unas, Asgard, etc) generally have as little interest in sex with humans as the humans do with them. Though given the nature of the show, most of the people are government officials, military, or otherwise high in status so any sort of hanky-panky would have to be very discreet to avoid... problems.
* ''Series/BabylonFive'':
** Captain Sheridan marries [[spoiler:and has a child with Delenn, a Minbari]].
** An episode subverted this trope with Ivanova, who did not want to have sex with an alien diplomat whose species uses the act to finalize business negotiations. Because the alien actually had no idea how humans mated, she she managed to trick him into thinking that a firm handshake and a weird dance was the human way to ''do it''.
** The one who was Boldly Coming was G'Kar, who in the earlier seasons would have sex with anything that had compatible genitals (apparently including humans). He also slept with one of Londo's wives. Since humans and Centauri are more or less incompatible[[note]]Centauri genitalia consist of six tentacles for the males emanating from the back and folded across the chest when not in use, and six corresponding slits for the female. Using all six is necessary for maximum pleasure/impregnation. As one might imagine, it's probably easier for a male Centauri to do the nasty with a human or human-compatible woman--or probably women--than the inverse.[[/note]], he apparently didn't feel limited by mere anatomical details. Technology is a wonderful thing. It should be noted that other than the genitals themselves Human and Centauri women look identical. Other Narn occasionally poke fun at him for it like it's a slightly embarrassing fetish.
** A scene (originally deleted) from the pilot movie indicates that there are guidelines restricting with which species humans are permitted to have sex. Speciesist? Maybe. But there are reasons...
--->'''Commander Sinclair:''' I wouldn't. You know the rules about crossing species. Stick with the list.\\
'''Man:''' What are you, a bigot or something?\\
'''Sinclair:''' No. But obviously you've never met an Arnassian before. After they finish, they ''eat'' their mate.
** The short-lived ''Babylon 5'' sequel ''Series/{{Crusade}}'' reveals that human-Pak'ma'ra porn exists. Also, certain creatures living in hyperspace may try to mate with passing starships. According to Creator/JMichaelStraczynski, one of the ExecutiveMeddling demands for the series that he turned down was a demand for the introduction of a "sexual explorer" character whose official job would be this.
* This is a large part of the Stephen Spielberg miniseries ''Series/{{Taken}}'', with the aliens breeding with humans to eventually create Ali.
* In the backstory of ''Series/{{Tracker}}'' -- most recently, Mel's grandparents.
* ''Series/RedDwarf'':
** Subverted (in the nick of time) during the sixth series when Lister is forced to marry a GELF in exchange for a part needed to repair their ship. While his new orangutan-like bride seems very eager to consummate their marriage Lister resists as best he can before escaping under the pretence of needing to "slip into something more comfortable... it's called Starbug." This episode's basic plot was adapted for the third volume of the novel 'verse, ''Last Human''. It took a [[BlackComedyRape very different approach]] in keeping with the generally DarkerAndEdgier tone of the books.
** While neither Rimmer or the Cat have actually done this, they both express interest in doing so; Cat (a humanoid evolved from a housecat) conjures up Creator/MarilynMonroe (as well as a reverse mermaid with the fish part on top) to date in the Total Immersion Video Game. Rimmer fantasizes about meeting aliens, and is very intrigued at the possibility of females with more breasts than is the norm.
* Brought up briefly in ''Series/TheThinBlueLine'' during the briefing in "Ism Ism Ism".
* The "bodily fluid" problem is a real one in ''Series/AlienNation'', as the Newcomers' flesh is corroded by salty water, and they are a ''lot'' stronger than humans. There are even formal classes would-be romantic partners can take in order to learn how to successfully copulate with each other. (In the sense the two participants safely achieve mutual satisfaction.) PlayedForLaughs when the male cop dating a Newcomer woman doesn't want to take the classes, and she, er, demonstrates their necessity. He comes into work the next day with a very ''specific'' neck injury, which his Newcomer co-workers immediately recognize the source of (and remedy for).
* ''Series/{{Hyperdrive}}''. Hilariously spoofed in the compulsory InstructionalFilm the crew has to watch before a FirstContact mission. We don't see it (fortunately) but the crews' reactions to what they are watching show it would make even Kirk think twice.
-->"Let's learn about another '''A'''lien '''S'''ex '''D'''isease. This crewmember had intercourse with a [[EverythingsSquishierWithCephalopods Glygonthian octopoid]]. Let's take a close look at his genitals. Pustules have developed, and on the pustules: warts. Soon, his entire groin explodes, leaving five baby octopoids, each with his face. Remember, Alien Sex is Danger Sex."
* In ''Series/FirstWave'', Gua infiltrators frequently use sex to achieve their goals. However, the show never actually shows us true Gua. All we see are HalfHumanHybrid husks with Gua minds downloaded into them. Presumably, they're engineered to be compatible with humans. To their delight, human sex is very pleasurable, unlike the very painful Gua sex, so they are all to happy to "sleep their way to the top". Also, they deliberately engineer most of their husks to be attractive. However, most humans have no idea they're actually having sex with an alien.
* In the sci-fi parody ''Series/{{Quark}}'', [[PlantAliens Ficus]] is ordered to seduce [[DaddysLittleVillain Libido]] so our heroes can escape. Turns out Vegetons mate by lying on their back with their limbs in the air.
-->'''Libido:''' What now?
-->'''Ficus:''' It's simple. We wait for the bee.

* Music/TheyMightBeGiants: The entire plot of the song "For Science" by exactly who you'd think would write a song about that.
* The entire plot of the song "Rishathra" by filk band Ookla The Mok.
* "E.T." by Music/KatyPerry, especially the version with Music/KanyeWest.
-->'''Kanye:''' ''Tell me what's next, alien sex\\
I'mma disrobe you, then I'mma probe you\\
See I abducted you\\
So I tell you what to do!''
* Music/DavidBowie's "Moonage Daydream" tells this story from the viewpoint of the alien GlamRock messiah [[Music/TheRiseAndFallOfZiggyStardustAndTheSpidersFromMars Ziggy Stardust]].
* Music/LadyGaga's "Venus" is a same-sex take on this trope.
* "Music/BannedFromArgo" plays this for laughs. Yes, the captain has to be extracted from group sex with five different species (and gender) of alien. Yes, the head nurse commits BlackComedyRape on the first officer. Yes, the helmsman's plants grew out of control and seduced the governor's wife. These are only a ''few'' reasons the crew in question got kicked off the planet.

* Heavily implied in the ''VideoGame/StarTrekPinball'' table "To Boldly Go", where the playfield is dominated by a leering James Kirk surrounded by a half-dozen wary women.

[[folder:Tabletop Games]]
* ''TabletopGame/{{Trinity}}'':
** The Coalition (a group of alien species) are another reverse example, as their goal is the acquisition of fresh genetic material... including through sex. [[spoiler:They ''rape the human first contact team to death'', try to do the same to the group that comes to check what happened to said team and are later observed doing it to a native alien population on a planet they've just taken control of.]]
** The d20 version plays it straighter, with sexual contact considered a normal method of interaction between species in the Coalition's home region of space. [[spoiler:The human first contact team gets raped to death unintentionally, but second contact goes well, with no sexual interaction.]]

[[folder:Video Games]]
* ''Franchise/MassEffect'':
** The exotophilia, near-universal biological compatibility, and empathy of asari probably smoothed out first contact with the salarians to no end. And the turians, later. And the humans. And the krogan. And then, and then, and then.... In fact, inter-asari relationships producing children are discouraged and the children of such relationships are given the slur "purebloods". "Pureblood" asari have a small chance of turning out to be [[OurVampiresAreDifferent Ardat-Yakshi]]. It's mentioned in flavor text for [[http://masseffect.wikia.com/wiki/Tevura Tevura]] that asari have always been exogamous, traveling far from their origins to find mates in order to prevent inbreeding. This makes anti-pureblood sentiment and preference for nonasari look a lot like aversion to incest, and raises the question of whether Ardat-Yakshi parents tend to be related.
** The series actually deconstructs this trope somewhat. Not only is alien fetishism a frequent topic of discussion within the game's universe (and not just from a human's perspective), but many pairings have to be careful not to poison each other with their bodily fluids during sex, as Mordin points out should Shepard enter a relationship with Garrus.
** Yeoman Kelly Chambers wholeheartedly endorses the boldly coming approach.
--->'''Kelly:''' [...]intimacy brings understanding.
** Even the Illusive Man, Human Supremacist Supreme, isn't exempt from this trope. Amongst the data the Shadow Broker keeps on him is a list of TIM's Sexual Liasons. There are a lot of human supermodels and an Asari Matriarch (twice). Averted in the case of his minion Kai Leng, who in the books finds [[FantasticRacism all aliens physically repulsive]] and considers the Asari [[PoliticallyIncorrectVillain "whorish"]].
** Grayson, one of the major protagonists of the ''Mass Effect'' book series, takes an asari lover in the third book and, after a particularly wild night with her, wonders ''how he would ever go back to humans''. Also, keep in mind that this coming from a man who once actively ''hated'' aliens.
** After Shepard and Grunt (a male krogan) take down a [[SandWorm Thresher Maw]] in the course of the latter's krogan rite of passage, Grunt receives a number of breeding proposals from female krogan... [[InLoveWithYourCarnage and so does Shepard,]] [[EventheGirlsWanther even if Shepard is a woman]].
** Tali also seems to have a touch of xenophilia; she's a viable love interest for a male Shepard, and if you don't hook up with her, she'll eventually end up in a relationship with Garrus, and during the Citadel DLC she's willing to entertain the possibility of a threesome with herself, female!Shepard, and Garrus. She also notes that an in-universe movie called ''Fleet and Flotilla'', about an inter-species romance between a quarian and a turian, "jumpstarted" her puberty. However, turians and quarians have similar dextro-amino body chemistry; not only can they have sex safely, but they can consume the same food, drink, and drugs, so pairings between the two races are not unusual.
** The existence of the magazine ''Fornax'', a publication dedicated to the finest in interspecies erotica, should tell you how this trope is faring in the ''Mass Effect'' universe.
*** It's worth noting that ''Fornax'' is specifically a human printed publication. While asari may be the most common race to date outside their species (for obvious reasons), the series seem to portray humans as the next most likely to engage in xenophilia, and we don't have the same excuses the asari do.
** Mordin Solus (a Salarian) is non-romanceable, but if the player goes long enough in ''VideoGame/MassEffect2'' without starting a romance with someone else, [[https://www.youtube.com/watch?v=-NZO1vrdq4w he will misinterpret Shepard's friendliness as a come-on.]] When asked if this has happened to him before, he confirms that it happens ''constantly;'' he's received propositions from asari, turians, and there is apparently a subset of krogan sexuality that finds salarians arousing.
** Javik claims that the Protheans did not "date" other species. They conquered them, enslaved them, sometimes ate them, but did not date them. Except for asari.
** In a case of RealityEnsues, however, HalfHumanHybrids are ''completely'' nonexistent, which is understandable given the troubles different pairings have in the first place. Even the asari technically reproduce asexually--a partner is necessary to stimulate her body into pregnancy, but the offspring is purely her own.
** From ''VideoGame/MassEffectAndromeda'', the tradition's still going across galaxies. Some angara, who've been in an eighty year long invasion that's left them severely untrusting of aliens, find humans intriguing. And, of course, the asari. An angara in their primary city can be heard complaining about how boring those humans are getting, then wondering where the asari are at ([[BlatantLies she likes the color blue, is all.]]). At one point, one of Ryder's teammates, an angara, speculates with Peebee - an asari - about cross-species romance. It's also possible to find "evidence" of at least one angara and one asari having done a little more than speculating.
* ''VideoGame/KnightsOfTheOldRepublic'':
** Over the course of both games, the possible romances include four humans, one Cathar, one Miraluka, and one Echani. (Fandom will also include the Zabrak tech for females...) However, one of the humans in the first game is the only pairing in which sex is confirmed to occur, the Echani looks just like a human (and is half-human anyway), the Miraluka is a human with no eyes.
** Miraluka and Echani are stated to be "near human," close enough to human for mating to work, but there are some genetic and culture differences due to thousands of years of adapting to their native worlds. The Cathar is a GayOption, and definitely not in the near-human bracket.
* ''VideoGame/StarWarsTheOldRepublic'' continues this legacy. The player character can be Human/Cyborg, Zabrak, Miraluka, Twi'lek, Mirialan, Rattataki, Sith Pureblood, Chiss, and later Cathar and Togruta. All of these races are RubberForeheadAliens at worst, and all possible love interests and one-night stands are from the same set. And no, none of them care which one your character is. They've presumably had millennia to work that out.
* ''VideoGame/StarControl 2'':
** It's possible to do this with Talana, the [[GreenSkinnedSpaceBabe blue-skinned space babe]].
** And the game's ending has the player character settling down with her and [[BabiesEverAfter having kids]].
** It's implied that humans originated on Syra, were [[TransplantedHumans transplanted]] by the Arilou to Earth and genetically-modified for some purpose.
** The Syreen in Star Control are this in general. Their planet was struck by a natural disaster [[spoiler: later revealed to not actually be all that natural]], and as the all-female Space Patrol were the vast majority of Syreen offplanet at the time, most of the race's survivors are female. They need males of other species (mostly humans) to keep their race going. MarsNeedsWomen inverted.
* ''VideoGame/WorldOfWarcraft'': For some reason, goblin males find orc women exceptionally hot.
** Exhibit 1: [[http://www.youtube.com/watch?v=ObVVe01tQJ0 The goblin male cranks dat Soulja Boy.]]
** Exhibit 2: [[http://rule34-data-000.paheal.net/_images/8578e0152a91274095263d488231c775/847039%20-%20Warcraft%20World_of_Warcraft%20leman%20orc.png The posterior view of the female Orc.]]
** Conclusion: [[http://knowyourmeme.com/memes/dat-ass Simple.]]
* ''VideoGame/DestroyAllHumans'':
** In the backstory, the [[TheGreys Furons]] arrived on Earth thousands of years ago and did this with the humans, to the point where nowadays, every human being on Earth has some Furon DNA. Later, the Furons return to Earth to harvest the pure, uncontaminated DNA from the humans in order to save their species from radiation-induced sterility.
** Crypto also does this with [[FemmeFataleSpy Natalya]] at the end of the second game as well as heavily suggested as doing this with an assortment of random women ever since getting his genitalia back.
* ''Franchise/TheSims'':
** In ''Videogame/TheSims2'' and ''Videogame/TheSims3'', Sims (and likewise female Sims) can [[IsThatWhatTheyreCallingItNow woohoo]] with aliens of either sex in their neighborhoods or homes.
** Also, if an adult male Sim gets abducted while looking into the telescope, he comes back traumatized and [[MisterSeahorse pregnant]] (definitely, in ''The Sims 2''; possibly, in ''The Sims 3''). Female Sims may come back traumatized, but not pregnant; to get a female Sim to have an alien baby, she either has to Woohoo with a male alien, or use one of the many existing cheats/mods.
** ''The Sims 3'' sims sometimes get a wish to Woohoo with an alien.
* In ''VideoGame/HuniePop'', [[spoiler: Celeste Luvendass]] is a SecretCharacter for this very purpose.

[[folder:Web Comics]]
* Dmitri from ''Webcomic/{{Spacetrawler}}'' has made it a personal goal to experiment with any alien which is "at least 50% compatible". 50% compatibility covers quite a range of bizarre alien biologies thus far: [[ClingyJealousGirl Shuar]] is insectoid, [[ApologeticAttacker Dal]] has eight stubby limbs and a face full of tentacles, [[http://spacetrawler.com/2011/04/05/spacetrawler-131/ this lady looks like she's part plant]], [[TheHedonist Choan]] has a worm-like head and gills (albeit with a [[GreenSkinnedSpaceBabe suspiciously humanoid figure]]), [[ThePollyanna Haldeyis]] is an ambulatory glowing barnacle, and he was last seen having a drunken roll in the hay with [[spoiler: the Eeb [[ActionGirl Red-9]]]].
* John the troll from ''Webcomic/FairyDust'' loved women from most fantasy races available. He counts on them finding him exotic.
* In ''Webcomic/LoonLand'' the alien Lana Loon lands on earth and has a close (failed sexual) encounter with the terrestrial loon Mike Moon [[http://www.loonland.net/?index=4]].
-->'''Mike:''' Hang on! You've got like five holes down here! Which do I poke it in?\\
'''Lana:''' All of them.

[[folder:Web Original]]
* ''Literature/ThreeWorldsCollide'' features a FirstContact scenario between humans and two other sentient spacefaring species simultaneously. One of these, dubbed "Super Happies", takes this trope and runs with it -- ''all'' their communication, both among themselves and with other species, is having sex. It seems that evolution decided that, while one transfers genetic information, all sorts of other information might be traded as well.
* Inverted and played straight in a 365 Tommorows [[http://365tomorrows.com/09/06/the-sybaris-affair/ story]]. In this case, the ones having carefree sex are the Sybaris, the alien species that the humans came into contact with. It's played straight by the human delegation to the Sybaris.
* According to WebSite/SFDebris, this is Starfleet policy:
--> '''Captain Picard:''' Son, as a Starfleet officer, I'm afraid you have no choice but to take that beautiful alien aside, and bone her twelve-ways-from-Sunday. It's part of the duty when you put on that uniform—that you'd have to take it off again to satisfy the endless lust of four-breasted aliens. Make the Federation proud! Make me proud!
--> '''Tom Paris:''' Aye, aye, sir, I won't let you down!
--> '''Picard:''' Lieutenant? Make it so.

[[folder:Western Animation]]
* ''WesternAnimation/{{Futurama}}'':
** Zapp Brannigan aspires to do this, but is just so bad at it.
--->'''Zapp:''' We have failed to uphold Brannigan's Law. However, I did make it with a hot alien babe. And in the end, is that not what man has dreamt of since first he looked up at the stars?... Kif, I'm asking you a question.
** Ironic of him to ask Kif that question, since Kif also ended up making it with a hot, alien babe, namely Amy Wong. Which means ''she'' filled this trope, too. And so did Leela, when ''[[MisterSeahorse she got Kif pregnant]]'' ([[BizarreAlienBiology accidentally; don't ask]]). In fact, Zapp is the only one of the four who ''hasn't'', despite having built his whole life around trying (he sleeps with Leela, who he thinks is an alien, but she later turns out to be a human mutant).
** If Amazonian women are alien and not just giant humans, then Zapp did make it with a significant number of hot alien babes.
--->'''Zapp:''' Ladies, please, the spirit is willing but the flesh is spongy and bruised.
** Fry as well, to a lesser degree. He's also bad at it, but that's because he's WrongGenreSavvy. [[CargoShip He's been known to mistake mundane (for the future, at least) objects for alien beings. At one point he made out with a radiator, thinking "she" was an alien ambassador from the "Radiator Planet".]]
--->'''Fry:''' Is there a burn ward within ten feet of here?
** Lrrr, Ruler of the Planet Omicron Perseii VIII, did this accidentally after separating from his wife Ndnd and going through a mid-life crisis. He hooks up with what he takes to be a hot Omicronian woman, but afterwards learns that she was a human in costume (it seems some humans are into this sort of thing), and she thought ''he'' was actually a human as well. Lrrr is horrified that he slept with a human, but the girl is still into it.
* Maxwell Tennyson a.k.a. "Grandpa Max" from the ''WesternAnimation/{{Ben 10}}'' series has dated at least one literal green-skinned space babe and later married an EnergyBeing who is also the mother of his sons and, through them, the grandmother of [[TheHero Ben]] and Gwen.
* How did ''WesternAnimation/StevenUniverse'' come to be? Well, that involves a little story he likes to call "The Ballad of Greg and Rose." It started with a young man playing through his concert like a comet and a mysterious 8-foot tall woman in the audience. He was a talented rocker who wanted to make it big. She was the leader of a group of sentient gem aliens with physical forms made out of light who protected the Earth. Their chance encounter gave birth to a beautiful love and, later, a beautiful son...
* The Galra Empire in ''WesternAnimation/VoltronLegendaryDefender'' has ruled most of charted space for thousands of years, so it feels kind of natural that a ton of interspecies mingling has apparently happened in that time. This has led to a decent percentage of the Empire's population being hybrids; they're generally accepted, but there are traditionalists who think that [[HalfBreedDiscrimination hybrids shouldn't be allowed in the military]]. Note that the Galra take this trope so far that [[spoiler:one of the main characters (Keith) is the product of a Galra secretly meeting and hooking up with a guy from Earth, before official first contact between the Galra and humanity has even happened]].