History Main / MaleToFemaleUniversalAdaptor

* A number of ''Film/GuardiansOfTheGalaxy'' fanfics invert this specifically to invoke BoldlyComing; this trope applies for almost all alien species ''except'' humans, and Peter gets laid so often by picking up adventurous women interested in ExoticEquipment.

[[folder: Comic Books]]

** Apparently human and Quarian genitals are similar enough that sex can occur normally once you get around the problems inherent in cross-species fluid contact.

** ''Literature/SteelBeach'' has the ULTRA tingle system, which gets around the whole genital compatibility issue entirely by using wireless modems for sex.
** [[TheProtagonist The actor protagonist]] of ''Literature/TheGoldenGlobe'' equipped himself with a penis that can be turned inside out for use as a vagina, primarily because it doubles his chances of getting roles.
** Finally, the novel ''Literature/TheOphiuchiHotline'' has literal [[MaleToFemaleUniversalAdaptor male to female universal adaptors]] that allow characters who go in for radically modified genitals to "dally" with their more conservative counterparts.
* In ''Literature/TheCaliforniaVoodooGame'', two conspirators meet at a sleazy hotel called the Mate & Switch. Each room is equipped with sensory-simulation bodysuits that let the wearer experience the sensations of being the opposite gender, making each a '''literal''' MaleToFemaleUniversalAdaptor.

* An interesting version occurs in the SuperHero novel ''Literature/SoonIWillBeInvincible''. [[TheHero The heroine]] Damsel is the daughter of a human male and a GreenSkinnedSpaceBabe, however, she was bred in a laboratory because her parents were ''not'' compatible with each other. Her mother wasn't even a mammal.

** Presumably the case at least most of the time, though you never actually see the genitals. Implied by Chiana and D'Argo, for instance, given that their sexual positions seem very human-esque and even though they are very different species explicitly stated as not genetically compatible, they still manage to have lots and lots of sex.

** Mordin has ''pamphlets'' on cross-species intercourse for whatever RomanceSidequest you pursue. Drell, turian, quarian, he's got you covered. It's not made clear if all the parts line up precisely. The pamphlets are necessary to achieve proper positioning and to hit the right erogenous zones. All we really know is that the respective parts are in the same general area on the humanoid species. It's also for health safety. Quarians with their atrophied immune system are only an extreme case. There are also all kinds of allergies to the body chemistries of other species. There can also be mechanical issues. One pairing (Female Shepard and Garrus, a turian) has ''chafing'' as a specific risk.[[note]]The reason for this being that turians have skin that's armored and slightly metallic due to their homeworld's weak magnetosphere... which apparently includes skin "down there".[[/note]]

* Apparently in ''Franchise/MassEffect'' human and Quarian genitals are similar enough that sex can occur normally once you get around the problems inherent in cross-species fluid contact.
** Don't forget the other races; heck, Mordin has ''pamphlets'' on cross-species intercourse for whatever RomanceSidequest you pursue. Drell, turian, quarian, he's got you covered. It's not made clear if all the parts line up precisely. The pamphlets are necessary to achieve proper positioning and to hit the right erogenous zones. All we really know is that the respective parts are in the same general area on the humanoid species. It's also for health safety. Quarians with their atrophied immune system are only an extreme case. There are also all kinds of allergies to the body chemistries of other species. There can also be mechanical issues. One pairing (Female Shepard and Garrus, a turian) has ''chafing'' as a specific risk.[[note]]The reason for this being that turians have skin that's armored and slightly metallic due to their homeworld's weak magnetosphere... which apparently includes skin "down there".[[/note]]

-->'''James:''' [[BuffySpeak Hey, how do you two... I mean, is s/he... you know—do turians/quarians/asari have all the same?]]
* [[spoiler: Celeste Luvendass]], a SecretCharacter from ''VideoGame/HuniePop''; Kyu even lampshades it.
* In ''Videogame/StarfoxAdventures'', [[NubileSavage Krystal]] - [[BeastMan a humanoid fox from another planet]] - wears a [[{{Stripperific}} very skimpy tribal outfit]] that mostly consists of [[https://vignette.wikia.nocookie.net/starfox/images/9/9f/KrystalAssistTrophyFront.jpg/revision/latest?cb=20180708110504 a bra and an impressively short loincloth]]. Originally, whether or not she actually ''wore'' anything under the loincloth was left [[AmbiguousSituation deliberately ambiguous]], but ''Videogame/SuperSmashBrosUltimate'' confirmed that [[VapourWear she wears absolutely nothing under it]]: her pubic area is [[NippleAndDimed shown in detail]], revealing that her [[https://web.archive.org/web/20190507085405/https://pbs.twimg.com/media/DuDzYdAVsAEHAK-.jpg labia]], [[https://imgur.com/OffoMLh cleft]] and [[https://pbs.twimg.com/media/DxGDXdjUYAA5lDs.jpg pubic]] [[https://pbs.twimg.com/media/D1NEb5AXcAATaog.jpg hair]] are quite humanlike.

[[folder:Web Comics]]

* ''Series/TheOutpost'': This is {{discussed}} by Wren and Janzo. It turns out that all of the other human and Blackblood organs are the same, so she asks if it's the case with their genitals. Janzo doesn't know, so they decide to find out. Yes, it turns out they are. This isn't entirely surprising here as Blackbloods look [[{{Demihuman}} very similar to humans]].

* Subverted in ''Literature/ADoorIntoOcean''. The Sharers of Shora are [[OneGenderRace all-female]] lesbian fish-women who, after centuries of AsexualReproduction, are unable to have penis-in-vagina sex. Mentions are made of Valedonians using [[RapeAsDrama rape to torture Shorans]].

* Played completely straight with Humans and Zentraedi in ''Anime/{{Macross}}'' (and by extension, ''Anime/{{Robotech}}''[='s=] adaptation of ''Anime/SuperDimensionFortressMacross''): the two species can have children without any sort of outside aid, as seen when Max and Milia have a daughter shortly after getting married. It's justified in the ''Macross'' {{continuity}} by the fact that the two races are almost genetically identical due to both being created by the [[ThePrecursors Protoculture]], with Human-Zentraedi hybrids having become a common sight in the later series. In fact, all the Protoculture-influenced [[RubberForeheadAliens humanoid]] species seem to be compatible with each other; for example, depending on what source you're looking at, [[Anime/MacrossFrontier Mikhail]] might actually be [[Anime/Macross7 part-Zolan]] (who are a ''marsupial'' species)[[note]]An in-universe radio drama in ''Dynamite 7'' claims that humans and Zolans are non-compatible, but this seems to have been retconned away by later sources[[/note]].

* ''TabletopGame/Warhammer40K'':

* Zig-zagged in ''WesternAnimation/StevenUniverse''. Gems don't reproduce sexually, so by default they lack the organs they would use to do so. However, they can also shape-shift organs into their form if they so choose (Gems don't need to eat, either, but some have literally grown a digestive system so they can eat and better relate to humans). [[WordOfGod Supervising director Ian Jones Quartey]] [[http://ianjq.tumblr.com/post/113794156834/i-know-that-the-gems-are-sexless-agendered-etc has confirmed]] that Steven's mom, Rose Quartz, deliberately shape-shifted a womb so she could have him with Greg, a human.

** G'Kar ([[spoiler:before his [[CharacterDevelopment spiritual transformation]]]]) ([[spoiler: and after: remember the removable eye on the wedding night]]) is seen as being also a bit of a pervert, being into Human women as well as at least one Centauri female. His species, although looking reptilian, are marsupials, including keeping their young in a pouch. As Na'Toth said in her first appearance, "It is not my place to speculate on how ''anything'' finds its way into your bed..."

* Most alien species, at least those encountered by Starfleet, seem to be sexually compatible with humans in the ''Franchise/StarTrek'' universe. Even those that shouldn't be, like the Cardassians (which, according to {{canon}}, supposedly evolved from reptile-like ancestors, but are capable of mating and reproducing with mammalian humanoids). In an unexpected subversion of this, it is noted that Klingons, Vulcans, and humans, while sexually compatible, have a difficult time producing hybrid offspring "without help".[[spoiler: In the Next Generation episode "The Chase" it is revealed long before humans, Klingons, Vulcans, Cardassians, and other races came into being, there was a dying race who spread their genetic material to developing worlds in hopes of their legacy continuing. This is likely the reason why there is such genetic compatibility.]]

* Presumably the case in ''Series/{{Farscape}}'', at least most of the time, though you never actually see the genitals. Implied by Chiana and D'Argo, for instance, given that their sexual positions seem very human-esque and even though they are very different species explicitly stated as not genetically compatible, they still manage to have lots and lots of sex.

** Aeryn (a Sebacean) has a child with Crighton (a human), even though she details many large differences in her reproductive biology.
*** Sebaceans do originally come from basic human stock but were genetically altered by the Eidelons in order to serve as their Peacekeepers.
** Apparently, Sebaceans are also ''technically'' genetically compatible with ''Scarrans'', who are, more or less LizardFolk (although their females look more human). Scorpius is the result of a female Sebacean being raped by a male Scarran (in fact, he was at first told it was a male Sebacean who raped his female Scarran mother, while in truth he was the only viable offspring produced by Scarran research into genetic compatibility between the species). He does have many health issues and can only survive with cooling rods inserted ''directly into his brain'' because his Scarran physiology produces tons of heat which his Sebacean physiology is especially vulnerable to and unable to deal with.
*** That said, it's hard to say how ''physically'' compatible a Scarran would be with a human or a Sebacean. For example, their [[PardonMyKlingon mivonks]] are internal, as one character found out after a GroinAttack utterly failed.

** Don't forget the other races; heck, Mordin has ''pamphlets'' on cross-species intercourse for whatever RomanceSidequest you pursue. Drell, Turian, Quarian, he's got you covered. It's not made clear if all the parts line up precisely. The pamphlets are necessary to achieve proper positioning and to hit the right erogenous zones. All we really know is that the respective parts are in the same general area on the humanoid species. It's also for health safety. Quarians with their atrophied immune system are only an extreme case. There are also all kinds of allergies to the body chemistries of other species. There can also be mechanical issues. One pairing (Female Shepard and Garrus, a Turian) has ''chafing'' as a specific risk.[[note]]The reason for this being that Turians have skin that's armored and slightly metallic due to their homeworld's weak magnetosphere... which apparently includes skin "down there".[[/note]]

* ''[[ComicBook/XWingSeries Isard's Revenge]]'': This is discussed in regards to Gavin's relationship with Asyr. While he says "the parts line up just fine" it seems they can't have children. Not surprising, given that Bothans appear to have evolved from canines.

* In ''Literature/WestOfEden'', Yilanè; have reptilian genitalia, including hemipenes on the males (who also function as MisterSeahorse). However, the female genitals are compatible ''enough'' with human equipment that Vaintè; and Kerrick are capable of having plenty of sex while the latter is the former's personal slave. It should be noted, however, that Vaintè is insane both by human standards and [[BlueAndOrangeMorality those of her own race]], and Kerrick was raised by Yilanè, and has (at this point) an incomplete and screwed-up understanding of human sexuality. When Kerrick returns to humanity, he starts looking back on his time with Vaintè in [[{{Squick}} disgust and horror]].

Makes the lovers able to consummate an InterspeciesRomance, if humans are involved. Compare NonMammalMammaries. Contrast ExoticEquipment. [[JustForFun/IThoughtItMeant Not to be confused with]] IkeaErotica.

-->'''Guy:''' That ain't right!!!

* In ''Literature/WestOfEden'', Yilané; have reptilian genitalia, including hemipenes on the males (who also function as MisterSeahorse). However, the female genitals are compatible ''enough'' with human equipment that Vainté; and Kerrick are capable of having plenty of sex while the latter is the former's personal slave. It should be noted, however, that Vaintè is insane both by human standards and [[BlueAndOrangeMorality those of her own race]], and Kerrick was raised by Yilané, and has (at this point) an incomplete and screwed-up understanding of human sexuality. When Kerrick returns to humanity, he starts looking back on his time with Vaintè in [[{{Squick}} disgust and horror]].

* In ''Literature/WestOfEden'', Yilanè have reptilian genitalia, including hemipenes on the males (who also function as MisterSeahorse). However, the female genitals are compatible ''enough'' with human equipment that Vaintè and Kerrick are capable of having plenty of sex while the latter is the former's personal slave. It should be noted, however, that Vaintè is insane both by human standards and [[BlueAndOrangeMorality those of her own race]], and Kerrick was raised by Yilan&egrave, and has (at this point) an incomplete and screwed-up understanding of human sexuality. When Kerrick returns to humanity, he starts looking back on his time with Vaintè in [[{{Squick}} disgust and horror]].

* Played completely straight with Humans and Zentraedi in ''Anime/{{Macross}}'' (and by extension, ''Anime/{{Robotech}}''[='s=] adapatation of ''Anime/SuperDimensionFortressMacross''): the two species can have children without any sort of outside aid, as seen when Max and Milia have a daughter shortly after getting married. It's justified in the ''Macross'' {{continuity}} by the fact that the two races are almost genetically identical due to both being created by the [[ThePrecursors Protoculture]], with Human-Zentraedi hybrids having become a common sight in the later series. In fact, all the Protoculture-influenced [[RubberForeheadAliens humanoid]] species seem to be compatible with each other; for example, depending on what source you're looking at, [[Anime/MacrossFrontier Mikhail]] might actually be [[Anime/Macross7 part-Zolan]] (who are a ''marsupial'' species)[[note]]An in-universe radio drama in ''Dynamite 7'' claims that humans and Zolans are non-compatible, but this has seems to have been retconned away by later sources[[/note]].

** The ''Literature/GaeaTrilogy'' has the Titanides, an alien species who are sexually compatable with humans because they were deliberately engineered to be sexually compatible with humans.

* In ''Literature/WestOfEden'', Yilanè have reptilian genitalia, including hemipenes on the males (who also function as MisterSeahorse). However, the female genitals are compatible ''enough'' with human equipment that Vaintè and Kerrick are capable of having plenty of sex while the latter is the former's personal slave. It should be noted, however, that Vaintè is insane both by human standards and [[BlueAndOrangeMorality those of her own race]], and Kerrick was raised by Yilanè and has (at this point) an incomplete and screwed-up understanding of human sexuality. When Kerrick returns to humanity, he starts looking back on his time with Vaintè in [[{{Squick}} disgust and horror]].

** In ''Literature/{{Spellsinger}}'' it looks like all [[BeastMan sentient mammals]] including humans are compatible, if not able to crossbreed. Jon-Tom decides not to investigate any further, when he gets a chance.
** In ''{{Literature/Quozl}}'', the eponymous aliens are human-sized marsupial rabbits, who copulate for recreation 20-60 times a day.[[note]]Which isn't as much as you'd expect. In a time for a human "quickie" Quozl can do it more than a dozen times.[[/note]] For some reason their scientists are shocked to learn they are compatible with humans and decide to keep it a secret from the rest of the population. (Preventing humans from going OutWithABang probably wasn't the reason. [[spoiler:And it didn't happen when the truth was revealed.]] More likely it was done to prevent Quozl from experimenting and to stay hidden.)

** The series unexpectedly describes Centauri genitalia quite explicitly and as being mostly (if not entirely, barring near-perverse levels of creativity) incompatible with comparable human anatomy. Although looking like they should be just simple RubberForeheadAliens (they look like sharp-toothed humans with strange hairdos), genetically they have nothing in common with us. To the point they have 6 tentacles (which are their penises) on the male and 6 vaginas on the female's backs. Their equivalent of kissing is penetration with just 1. Oh and the tentacles are prehensile and Londo gets caught using one to cheat at poker...

* Most alien species, at least those encountered by Starfleet, seem to be sexually compatible with humans in the ''Franchise/StarTrek'' universe. Even those that shouldn't be, like the Cardassians (which, according to {{canon}}, supposedly evolved from reptile-like ancestors, but are capable of mating and reproducing with mammalian humanoids). In an unexpected subversion of this, it is noted that Klingons, Vulcans and humans, while sexually compatible, have a difficult time producing hybrid offspring "without help".[[spoiler: In the Next Generation episode "The Chase" it is revealed long before humans, Klingons, Vulcans, Cardassians, and other races came into being, there was a dying race who spread their genetic material to developing worlds in hopes of their legacy continuing. This is likely the reason why there is such genetic compatibility.]]

*** Sebaceans do originally come from basic human stock, but were genetically altered by the Eidelons in order to serve as their Peacekeepers.

* In ''Webcomic/{{Drowtales}}'', because dragons are descended from elves who were mutated or changed into the four legged lumbering beasts they are today, they are able to mate with[[note]]Dragons are the ''size of small elephants''[[/note]] and produce offspring with normal drow.

* Creator/JayNaylor varies use of this trope. Sometimes male organs are human-like, other times (mostly with equines and canines) they are anatomically close to the RealLife animals. Females, however, universally have human-like vaginas.

* The title trio of the American animated series ''WesternAnimation/AquaTeenHungerForce'' have all displayed sexual interest in and claim to have had sex with human females at one point or another, despite the apparent lack of genitalia (and the fact that all three are a giant, anthropomorphic foods -- a box of fries, a milkshake and a meatball). And yet two have vaguely phallic appendages and the third can change his form a bit... However, it should be noted that Shake is a huge goddamn liar, and Frylock mentions at several points that Shake doesn't have a penis. When Shake claims to have had sex one time, Frylock's response is "When? How? With ''what''?" It's repeatedly mentioned that Frylock is a virgin, but this seems to be attributed more to his nerdiness than any physiological shortcomings. Finally, any claims Meatwad makes are probably made without any understanding of what he's talking about, just parroting things he overheard from Shake, Frylock, or Carl. [[spoiler:Until the series finale where Meatwad has a wife and kids.]]
* In ''WesternAnimation/Ben10AlienForce'', the main source of superpowers is revealed to be having alien ancestry, which includes, among other things, energy beings (although granted said energy being could assume human form) and an alien made out of living fire (which is a bit harder to explain). Plus there's the whole human marrying Mud Monster story from the previous series....

** In ''Literature/{{Spellsinger}}'' it looks like all [[PettingZooPeople sentient mammals]] including humans are compatible, if not able to crossbreed. Jon-Tom decides not to investigate any further, when he gets a chance.

* The title trio of the American animated series ''WesternAnimation/AquaTeenHungerForce'' have all displayed sexual interest in and claim to have had sex with human females at one point or another, despite the apparent lack of genitalia (and the fact that all three are a giant, anthropomorphic foods -- a box of fries, a milkshake and a meatball). And yet two have vaguely phallic appendages and the third can change his form a bit... However, it should be noted that Shake is a huge goddamn liar, and Frylock mentions at several points that Shake doesn't have a penis. When Shake claims to have had sex one time, Frylock's response is "When? How? With ''what''?" It's repeatedly mentioned that Frylock is a virgin, but this seems to be attributed more to his nerdiness than any physiological shortcomings. Finally, any claims Meatwad makes are probably made without any understanding of what he's talking about, just parroting things he overheard from Shake, Frylock, or Carl.

* In ''Videogame/StarfoxAdventures'', [[NubileSavage Krystal]] - [[IntelligentGerbil a humanoid fox from another planet]] - wears a [[{{Stripperific}} very skimpy tribal outfit]] that mostly consists of [[https://vignette.wikia.nocookie.net/starfox/images/9/9f/KrystalAssistTrophyFront.jpg/revision/latest?cb=20180708110504 a bra and an impressively short loincloth]]. Originally, whether or not she actually ''wore'' anything under the loincloth was left [[AmbiguousSituation deliberately ambiguous]], but ''Videogame/SuperSmashBrosUltimate'' confirmed that [[VapourWear she wears absolutely nothing under it]]: her pubic area is [[NippleAndDimed shown in explicit detail]], revealing that her [[https://i.imgur.com//OffoMLh.jpg labia]] and [[https://pbs.twimg.com/media/D1NEb5AXcAATaog.jpg pubic hair]] are quite humanlike.