%% Image selected per Image Pickin' thread: http://tvtropes.org/pmwiki/posts.php?discussion=1340758758019200100
%% Please do not change or remove without starting a new thread.
[[quoteright:350:[[ComicBook/TeenTitans http://static.tvtropes.org/pmwiki/pub/images/rsz_y0207_9313.jpg]]]]

->'''Susan''': Oh Reed, that sex was wonderful.\\
'''Reed''': Was it, hehe-- ''[morphs]'' Surprise! I was really a Skrull all along, baby!\\
'''Susan''': ''[morphs]'' '''''FRANK!'''''
-->-- ''ComicStrip/TwistedToyfareTheatre'' spoof of the ''ComicBook/FantasticFour''

A trope in which Carol has sex with Bob by pretending to be Alice. In short, "My God, Whom Have I Done?"

In the classic version which gave this trope its name, Carol accomplishes her coup by slipping into bed with Bob after dark; Bob is typically too sleepy to notice the difference. This can be justified in cases where Bob and Alice have never slept together before, but if Bob and Alice are married it strains the audience's WillingSuspensionOfDisbelief (he can't tell the difference between Carol and his wife of five years?). Historically, it was commonly used the other way round: Carol, as the wife that Bob rejected, took the place of Alice, who was desperate to escape Bob's wooing. Nowadays it's achieved by {{shapeshifting|Seducer}} or some other device by which Carol could plausibly fool Bob into believing that she is Alice.

This is one of TheOldestTricksInTheBook and a common origin story for mythological heroes (often with a god playing the role of Carol). As a general rule, the farther back you go in time, the more likely it is that the person you're sleeping with isn't who you think they are, though it's seen something of a revival in {{Soap Opera}}s (usually with the [[JustifiedTrope added justification]] that the person being fooled is drunk).

For once, the LawOfInverseFertility is inverted: a woman who uses this to try to get pregnant is likely to pull it off, even after one time in bed.

When PlayedForLaughs, expect Carol-as-Alice to be much better in bed than the real Alice. If it's Dan impersonating Bob, expect [[BiggerIsBetterInBed Alice to notice "Bob" has grown a few inches]], especially if it's a parody. For cases when Bob suspects something, see NotRightInTheBed. (A rather twisted case of SpotTheImposter in both cases.) Basically, a sub-category for BlackComedyRape.

Compare with BrideAndSwitch and DoubleStandardRapeSciFi. If Bob ''knows'' who he's with, but it becomes apparent he's ''imagining'' it's someone else, you're looking at WrongNameOutburst. Not to be confused with a [[MurphysBed Trick Bed]].

This is basically the definition of '''rape by deception''' (or rape by fraud), though that crime can also include situations like doctors performing unnecessarily invasive sexual acts on patients while claiming that they're necessary for diagnosis or treatment. Not all areas recognize this crime, but in the U.S. under expanding federal definitions of rape to include any non-consensual penetration, it's very likely to be prosecuted in the same vein as all other forms of rape. In other words, DoNotTryThisAtHome. Seriously. We mean it.



[[folder:Anime & Manga]]
* Sae poses as Momo and attempts to do this to Toji in ''Manga/PeachGirl''. It nearly works… until Toji turns the lights on…
* Attempted in episode 8 of ''Anime/MawaruPenguindrum'', [[spoiler: when Ringo, who is obsessed with the idea of [[StalkerWithATestTube being the mother of Tabuki's child]] for VERY complicated reasons, [[SlippingAMickey drugs a cake that Tabuki eats]] and then disguises herself as his fiancée Yuri.]] Luckily, she's stopped before anything can happen [[spoiler: by her best friend Shouma.]]
* In a late chapter of ''Manga/BloodAlone'', Higure ties up and gags Misaki and then pretends to be her in order to get Kuroe to make love to him. Thankfully, Koroe isn't into little kids, so the rape attempt fails regardless..
* Hinata very nearly pulls this one on Shoei, by pretending to be his girlfriend Mio in ''Manga/DesireClimax''. For more context, Shoei is nearly blind without his contact lenses and Hinata grew up with Mio and can imitate her fairly well. Thankfully Shoei figures it out before they can get up to anything.

* In the Literature/{{Child Ballad|s}} "Gil Brenton", the heroine sends her maid to her wedding bed to hide that she is not a virgin and is pregnant. The groom discovers this. His mother investigates and discovers that the bride was in fact a woman the groom had dallied with earlier, and so informs her son without actually adding "You idiot."

[[folder:Comic Books]]
* In ''Comicbook/{{Runaways}}'', Karolina is dating genderless/[[GenderBender multigender]]/[[{{transgender}} really-female-but-looks-like-a-dude-sometimes]] [[VoluntaryShapeshifting shapeshifter]] Xavin, but is also interested in Nico, [[{{UST}} who she has had a crush on for most of the series]]. At one point, Xavin tried appearing as Nico because she thought that this was what Karolina really wanted and that it would help Karolina deal with her emotions. It did not work; Karolina thought it was "some kind of sick test". Xavin, not being from around here, is somewhat baffled.
* ''ComicBook/SubMariner''. Lemurian supervillainess Lyra tricked Namor into sleeping with her by disguising herself as Susan Richards.
* Also from Marvel, [[ComicBook/IncredibleHercules Hercules]], as part of a ZanyScheme involving him pretending to be Thor, ended up sleeping with the queen of the Dark Elves. However, it's clear that Alflyse had sex with him because she was incredibly attracted to him and his macho mannerisms, rather than because he was posing as Thor. It's also not entirely clear whether or not she already knew he wasn't Thor and was just playing along--she certainly doesn't seem at all upset when the truth comes out, and happily sleeps with him again.
* One of Franchise/SpiderMan's enemies, the Chameleon, impersonated Spidey and slept with his roommate. Somewhat unusual in that this is being played up [[UnwantedHarem as an inconvenience to Peter]], and very unusual in that [[InternetBackdraft a very vocal segment of the fanbase]] has been loudly angry about that being an [[BlackComedyRape unacceptable use]] of a Spider-Man comic.
** In a different Spidey comic written well before this, the Chameleon attempted to do this to Mary Jane (as in the above case he was disguised as Peter), only to be {{defied|Trope}}. When he kisses her, she realizes it isn't him (with an extra spewing of information Peter should have known to be false to make sure), and then proceeded to [[BatterUp beat him senseless with a baseball bat]].
** In another SpiderMan trope, ComicBook/DoctorOctopus did a GrandTheftMe on Peter, and tried to get fresh with Mary Jane as well. She felt something was off because Peter wasn't himself (plus they were [[ComicBook/OneMoreDay no longer together]]) and Doc Oc gave up his attempts. He tried again later with another woman, Anna Maria, who had no clue about anything. When Peter got back his body and let her in on everything, she was quite stunned by what had gone on.
* Pictured above: Just to hop the fence from Marvel to DC, [[ComicBook/TeenTitans Dick Grayson]] was seduced by the shape-shifting Mirage in the form of his girlfriend Koriand'r/Starfire. This was a large factor in them subsequently breaking up. Mirage even goes so far as to taunt Dick for not noticing the difference.
* Brazilian newspaper comic ''{{Aline}}'' had one of the Aline's boyfriends disguising himself as her to trick a lesbian who had a crush on Aline.
* Typhoid Mary pulls this on {{Deadpool}} by disguising herself as Siryn. He does not take it well.
* In ''Comicbook/XFactor'', Multiple Man awakens one morning to find that one of his dupes got out accidentally and has been, uhm, enjoying himself. Later, Siryn and M separately tell him how wonderful the night before was, indicating that he slept with one while the dupe got with the other, pretending to be him. [[spoiler:It later turns out they ''both'' slept with dupes, and that a dupe managed to get Siryn pregnant.]] Sort of a borderline example; no one was tricking anyone else. Jamie and his dupes tend to get confused about who did what, since they're born with all his memories, and when he reabsorbs them, he remembers what they did as if he himself did it.
** That hadn't even been the first time Siryn had slept with a duplicate of Jamie without realizing it. Seeing how mad she had gotten when he told her what had happened, the first time around, it's kind of frustrating that she fell for the exact same "trick" a second time.
* ComicBook/{{Mystique}} created a new identity in ''Comicbook/XMen'' as a student known as Foxx, in order to seduce Gambit and break him and Rogue up. Later, when Gambit realizes who she is, she tries to seduce him again by taking Rogue's form and telling him that it wouldn't be cheating if they had sex while she appeared as Rogue.
** Mystique is fond of this trope. In a Nightcrawler backstory, Mystique shapeshifts into a frigid maid to sleep with the driver and convinces him to sneak into the castle later that night and asks him to wake her up with sex... all so she can watch the driver be thrown from the house after the maid screams rape when he crawls into her bed that night. He's fired, the maid is mentally scarred, and Raven thinks it's all hilarious.
** Another occasion had Mystique testing out her newly upgraded powers by seducing Wolverine in the form of his ninja ex Yukio. On a battlefield while surrounded by dead ninja. Mystique also took pictures and mailed them to Wolverine's current girlfriend.
** In issue 7 of Comicbook/{{Wolverines}} Mystique actually uses this as a ''threat'' against Comicbook/{{X 23}}.
-->''Mystique transforms into [[Comicbook/AllNewXmen Teen!Warren]].''\\
'''Laura:''' ''Warren''...\\
'''Mystique:''' Oh yes, Laura. ''Warren''. Think of this moment the next time he wraps you in the warmth of his wings. Think...and wonder whose hands are ''actually'' touching you. Or perhaps I'll make love to him as you...do the things he ''wants'' but is afraid to ask for, because of your...[[Comicbook/{{NYX}} past]].
** So, in case you have't figured it out already, she is one sick fuck.
* Morph played with this in the animated version, "The Uncanny X-Men" while under Sinister's control. He posed as Rogue to invite Gambit over for a GRatedSex encounter, but when Gambit stumbled on the real, sleeping Rogue, (as Morph intended) he didn't get any farther than stealing a kiss before all chaos literally broke loose.
* Anton Arcane, ''Comicbook/SwampThing'''s primary nemesis, famously did this to Abby, his own niece, by possessing the body of her husband. That isn't even the worst thing he's done to her.
* In the second issue of the 2011 relaunch of ''{{Voodoo}}'', the title (female) character shapeshifts into the (male) partner of Agent Fallon, whom Fallon is sleeping with and who Voodoo has just [[KillAndReplace killed]]. Voodoo then goes back to Fallon's hotel room and sleeps with her, before the truth comes out the next morning. Though it is never described as 'rape,' and Fallon is more angry over the death of her lover, in issue #8, when Voodoo tries to claim that they shared a legitimate emotional connection, Fallon is quick to point out that she does not love Voodoo at all, and that was simply the bond that she had with her lover. [[spoiler: Voodoo admits that, yes, it was meaningless. She then kills Fallon]].
* Cilla disguises herself as his student to have sex with ComicBook/{{Blade}}, but he doesn't do the deed willingly and there were other forces involved. The disguise was primarily to put him at ease, since he would have attacked her on sight otherwise.
* ''ComicBook/TheBatmanAdventures'': Madeline, TheVamp, tries to seduce Harvey Dent by pretending to be his fiancee, aka her straight-laced twin sister Marilyn. Harvey figures her out right away but she persists in appealing to the [[AllGirlsWantBadBoys bad boy in Harvey]] and he ends up sleeping with Madeline anyway.
* In ''ComicBook/TilDeathDoUsPart'', the Parasite (Rudy Jones), having learned Superman's true identity, takes the place of Lois Lane and attempts to tear him down emotionally by ruining their marriage. To facilitate his plan, he approaches an oblivious Lex Luthor and conducts an "extramarital" affair with him while in Lois's form. Unsurprisingly, Luthor is furious when he finally learns the truth.
* In the ''Negation War'' storyline of Creator/CrossGen Comics's ''Sigil'' universe (original series), [[spoiler: Capricia the Atlantean is directed to seduce SpaceMarine Sam Rey in the form as the latter's fiancee Zanniati, with the intent of producing an Atlantean-hybrid child capable of inheriting Sam's [[PowerTattoo Sigil]]]]. Sadly, Creator/CrossGen tanked, canceled, and was bought out by Disney before the results of this (planned or unplanned) came to light, and neither character returns in the new series.
* A variation occurs in Creator/BillWillingham's ''[[ComicBook/TheElementals Elementals]]'' comic. The villainous Shapeshifter[[note]]whose human default form is female, but if "she" is really millions of years old as claimed, what "her" original gender if any may have been is speculative[[/note]] doesn't per se ''impersonate'' Morningstar's boyfriend -- she simply turns into the kind of guy she's sure her enemy can't help but fall for and indeed begins an affair that lasts for months without ever being detected. In the end, she simply ''reveals'' herself on a nice quiet outing and leaves Morningstar emotionally devastated enough to [[spoiler:almost drive her to suicide]], as well as [[spoiler:embarrassingly pregnant with ''some'' kind of shapeshifting offspring]].
** Though, in both an EarlyBirdCameo and a [[SubvertedTrope subversion]], an earlier issue set thousands of years in the future shows [[spoiler: Morningstar and the shapeshifter in a committed, lesbian relationship by that point]].
* Another of Creator/BillWillingham's works, ''Comicbook/{{FABLES}}'' sees a [[spoiler: GenderBender]] example of this trope, with Cinderella waking to discover that her latest lover is actually ''[[spoiler: her arch nemesis Dorothy Gale and not Ivan Durak.]]''
* ''ComicBook/{{Empowered}}'' has a few examples.
** The ultimate example, where Ninjette, when she was still with her ninja clan, took an infiltration mission than included consummating another ninja's marriage... ''[[GenderBender As the groom]]''. In-universe she's considered the ultimate MasterOfDisguise for this, but she mentions at one point that she's not exactly proud of it.
** Also of note, Ninjette spends 3 pages in an imagine spot impersonating Emp in bed with Thugboy.
** It's also implied in the same page that shows her as the aforementioned groom that she's done this to Emp as ThugBoy as well.
* ''Comicbook/TheBoys'':
** The Homelander once convinced Black Noir to pretend to be him when having sex with Queen Maeve. [[spoiler: This turns out to be {{Foreshadowing}} to the fact that Black Noir is a clone of the Homelander.]]
** The shape shifter Malchemical was moved from Team Titanic to Super Duper after impersonating the leader of Team Titanic. He was only found out when it turns out that the leader's girlfriend was really into the anal Malchemical introduced her to.

[[folder:Fan Works]]
* There's a certain subset of the ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' fandom that suspects that the shape-shifting EmotionEater Queen Chrysalis might have taken advantage of Shining Armour in this manner during the climax of Season 2. Her MindControl abilities would certainly make it easy if Shining was unwilling. One of the few fanfics that doesn't play this conceit for cheap laughs is ''FanFic/CadenceInAMinor'', which depicts the incident as exactly what it would be in real life: A horribly traumatic experience that messes him up in several ways and threatens to destroy his marriage. (NB: If it's not immediately obvious from the description, anyone with recent experience dealing with post-traumatic stress disorder may want to give this one a miss.)
** ''Fanfic/AllAmericanGirl'' also has a serious occurrence of this, with Chrysalis storing Shining's genetic material and using it to create an army of unicorn/changeling hybrids (Chrysalis terming the species "pepsis"), treating those who show any of their father's nobility as ChildSoldiers (especially since she accelerates their aging) and CannonFodder.
* A subset of the Series/StarTrekTheNextGeneration fanfic community has done this with the pairing of Picard/Q. As Q is an EnergyBeing with the power to shape-shift at will, and has canonically admitted to be able and willing to transform into a female if the entity thought it could get an amusing reaction out of Captain Picard, there are stories where Q will show up to Picard as a woman with no resemblance to his usual male form and will trick him into bed. For example in ''[[http://archiveofourown.org/works/622434?view_adult=true]] [[PunnyName Q-ockblocking]]'' Q sabotages multiple romantic ventures by taking the appearance of Picard's date for that evening and then assumes his usual male form to let Picard know he tricked him, all just for laughs.
* In ''Webcomic/OnePunchMan'' NSFW fanfic ''[[http://archiveofourown.org/works/5775328/chapters/13309912 Mirror Mirror]]'' Genos is almost seduced by the [[SetRightWhatOnceWentWrong time-traveling]] BadFuture Saitama, who got a little ecstatic since [[TheLostLenore Genos is dead in his timelime]]. Genos, who had no idea of the deception, is happy that Saitama return his feelings for him until the actual Saitama [[InterruptedIntimacy interrupts them.]]
* The ''WesternAnimation/MiraculousLadybug'' fic ''Pouvez-vous me laisser entrer?'' plays with this, by having Ladybug visiting Adrien in his room after finding out that he's a fan of hers and initiating a sexual relationship with him while concealing that her secret identity, Marinette, has been a classmate of his for years. Note though that Adrien is also concealing his other identity as Ladybug's partner Chat Noir. Marinette is shown to be eaten up by guilt at her deception, but she persists with the relationship [[spoiler:until one night when Adrien's blindfold comes undone at the worst possible moment, causing her to flee the house, fearing that she's ruined everything. However, Adrien is not the least bit disappointed with who she is under the mask, and is somewhat shocked when she confesses to Chat Noir that she "used Ladybug to trick a guy into sleeping with [her]"--he doesn't feel tricked at all and if anything loves Ladybug more than ever knowing that she's Marinette.]]
* In ''[[https://www.fanfiction.net/s/12183167/1/Polyjuice-Cocktail Polyjuice Cocktail]]'' Hermione's mother, while [[{{Shapeshifting}} Polyjuiced as Hermione]] talks Harry into having sex with her.

[[folder:Fairy Tales]]
* In "Little Annie the Goose-Girl", an impure bride substitutes little Annie for herself to fool the bridegroom's magic stone, which will reveal her character to him. Then she discovers that the magic works getting out of the bed as well as in. After three attempts, the bridegroom marries little Annie.
* Reversed in an old story. A fairy/magic/sorcerer king needs an enemy defeated, and can't do it himself. He enlists the help of a human king/nobleman. The sorcerer-king uses his powers to make each look exactly like the other, and gives the human king specific instructions on how to defeat the enemy, and specific permission to use anything and everything he owns as though it actually belongs to the human king--including the sorcerer-king's ''wife''. The human king does as he's bid, but lays a sword or bolster down between him and the fairy queen. (In some tales, this happens for a ''year''.) At the right time, the human king kicks the bad guy's tail, then rides back to the agreed-upon meeting spot and switches back with the other king. When the sorcerer-king gets home, his wife wants to know what the deal is with the not sleeping together and all. (Exactly what she says depends on the story.) The sorcerer-king is both shocked and impressed, because the queen is described as a very beautiful woman. (And usually the human king has no wife of his own to remain faithful to.)
* Likewise averted in "Literature/TheTwoBrothers" by Creator/TheBrothersGrimm, in which the brother mistaken for his valiant twin keeps the new queen from accidentally cheating on her husband by placing a double-edged sword between them. Once the brother who married her sorts out what happened, the HappilyEverAfter line for this tale is: "Then he knew how true his brother had been."
* One fairy tale type -- include the Gypsy "The Tailor's Clever Daughter" -- has a man refuse to sleep with his bride. Her solution is to slip from the prison where he keeps her and trick him into sleeping with her as a different woman, three times. [[LawOfInverseFertility Getting pregnant each time, often after one night.]]

* A variant in ''Film/WayDownEast'', in which the bad guy ''fakes a wedding'', complete with a fake priest, in order to get the virginal heroine to go to bed with him.
* Frank-n-Furter in ''Film/TheRockyHorrorPictureShow'' pulls this in order to [[CorruptTheCutie corrupt the innocent couple Brad and Janet.]] They both figure it out part way through, and they both go through with it anyway.
* In ''Film/SingleWhiteFemale'', [[PsychoLesbian Hedy Carlson]] disguises herself as Allison Jones in order to sleep with Allison's boyfriend. Made all the more chilling in that she previously ''dyed her hair to look exactly the same'' as well as, well generally being a nutjob.
* In ''Film/X2XMenUnited'', Mystique shape shifts into Jean Grey in an attempt to sleep with Logan. One could probably say it was subverted, since Logan found out pretty much in the first minute when he felt a scar he previously had left on Mystique.
** The novelization claims [[TheNoseKnows he identified her by scent]] before she even entered his tent, but he played along until he got bored/annoyed/angry, it's not especially clear which.
* Lewis pulls this on Betty in ''Film/RevengeOfTheNerds''. He's wearing a Darth Vader mask, and she just assumes her boyfriend is feeling kinky, and Lewis set up the situation specifically for this to happen and doesn't bother to correct her assumption.
* ''Film/{{Multiplicity}}'': A busy man starts making clones of himself to substitute at work, etc to make his life easier. His wife gets exceptionally horny one night while he's on a business trip and the clones are roaming about the house. HilarityEnsues. This was lampshaded earlier in the movie where the protagonist explicitly tells his clone that this is absolutely forbidden, and while the clones tried to resist they're all, at heart, the same guy who still loves her and find they can't do it.
** The early-generation clones made some effort to resist, but since the third is rather retarded (since he's a clone of a clone, rather than the original) he basically just goes "duh, okay."
* In ''Film/TheBoatThatRocked'', also known as ''Pirate Radio'', one of the young protagonist's boat companions sets this up for him so he can lose his virginity. [[spoiler:But, freaked out about the whole affair, he loses his head and turns the lights on.]]
* Discussed in ''Film/TheChangeUp'', which involves a FreakyFridayFlip between a bored husband and an unattached playboy. The playboy asks what to do if the husband's wife propositions him for sex.
* ''Film/FaceOff'': After Castor Troy has Sean Archer's face surgically grafted onto his head, he taunts Sean (who has Castor's face grafted on his) about how among other things, he'll have his way with Sean's wife. Later, he romances and seduces her.
* In ''Film/{{Clash of the Titans|2010}}'', Perseus is born as the result of Zeus disguising himself as King Acrisius and sleeping with his wife Danae. Just as the real Acrisius enters the bedchamber, Zeus changes back with a smirk, having done the deed, turns into an eagle and flies off. Danae ''immediately'' gives birth, and Acrisius kills her in a fit of rage. He's about to do the same to baby Perseus, but standing on a cliff in the middle of a storm and waving your sword around like a lightning rod (while screaming insults to the gods) is not a very good idea.
* Miguel tries to pull this off in the opening of ''Film/BloodyMoon''. Murder, and a trip to mental hospital ensues.
* In the soft-core porn ''ComicStrip/FlashGordon'' spoof, ''Flesh Gordon 2: Flesh Gordon Meets the Cosmic Cheerleaders'', the BigBad insists his overweight wife [[BrownBagMask wear a bag on her head during sex]]. Flesh Gordon enters the room instead and has sex with her, which [[BiggusDickus doesn't bother her in the least]], even when she realises who it is.
* Happens all over the place in the ''Film/EmmanuelleInSpace'' softcore films thanks to the HumanAliens' transmutation technology that allows them to look like anyone. One of the films shows [[Film/{{Emmanuelle}} Emmanuelle]] having sex with her ''very'' close friend. Only after they're done does she realize that it was actually Captain Haffron of the alien craft. Does she feel tricked? No, she thinks it's very romantic. For his part, Haffron didn't intend to have sex with her and simply got sidetracked. In another film, Emmanuelle is the one who plays a game on Haffron by telling him that she'll use the transmuter to disguise herself as any woman on the cruise ship. He ends up sleeping with a number of women assuming they're all Emmanuelle. Only later does he find out that only one of them was. The other three women are ''not'' amused.
* In ''Film/MeMyselfAndIrene'' Hank convinces Irene that he's the Charlie personality and proceeds to have a night of wild sex with her. Charlie and Irene are both annoyed about it.
* In ''{{Film/Enemy}}'', Adam and Anthony both impersonate each other, winding up having sex with the other's girlfriend/wife respectively.
* Dante pulls an unintentional one on then-girlfriend Caitlin Bree in the backstory to ''Film/{{Clerks}}''. He passes out in a darkened bedroom at a party and wakes up to find Caitlin in bed with him. The two have sex, and he only later learns that she had arranged to meet another man there and believed herself to be sleeping with him. He counts this as the "half" of her eight and a half acts of infidelity. [[spoiler: The incident is later inverted when she enters a darkened bathroom and has sex with what she believes is an uncharacteristically silent, stoic Dante, but is in fact the [[ILoveTheDead corpse]] of a man who had [[{{Squick}} suffered a fatal heart attack hours earlier]].]]
* This is used twice in ''{{Film/Excalibur}}'':
** The first had Uther Pendragon, with Merlin's help, using an illusion spell to take on the appearance of his enemy Gorlois and bed Gorlois' wife Igraine, resulting in the conception of Arthur.
** The second occasion has Morgana using a similar spell to make her appear as Guinevere in Arthur's eyes and [[VillainousIncest allow her to proceed to rape him]].

* Back in the days when you needed a good reason to be issued a divorce, a man goes into court complaining how he had been tricked into committing adultery when his wife's twin sister would sneak into his bed and have sex with him. The judge is kind of wary of this argument, saying, "You've been married for ten years and couldn't tell that it wasn't your wife when you made love?" The man said, "Yeah, I could tell. That's why I want a divorce."
* An unusual variant is the joke where a very suspicious wife, convinced that her husband is cheating on her, allows him to attend a costume party in a devil costume. She then sneaks in wearing a costume of her own, finds her devil-suited husband on the dance floor, and convinces him to take her upstairs for a quick one. She then leaves, smugly certain about his infidelity. The next morning she asks him how the party went. "Kind of boring, really," he tells her. "I played cards all night in a back room. But the guy I loaned my costume to said he had a great time!"

* The Reeve's Tale in ''Literature/TheCanterburyTales''.
* "Gombert et les deus Clercs", a French fabliau.
* In Bedier's ''[[Literature/TristanAndIseult Tristan et Isolde]]'', the handmaiden Branwen switches places with Isolde in King Mark's bed to hide the fact that Isolde is no longer a virgin. Occurs in most other versions of that story as well.
* In ''Literature/TheThreeMusketeers'', D'Artagnan spends a night with [[FemmeFatale Milady de Winter]] pretending to be Count de Wardes, both for the reason of getting information out of her and for the obvious reason. After that, he insults her (still acting as de Wardes!) and [[DesignatedHero gets to sleep with her again]], as himself this time, since she wants revenge on de Wardes. She winds up asking D'Artagnan to challenge de Wardes to duel. It gets worse.
** You'd think a woman as experienced as Milady would realize she's bedding the ''same man'' but apparently not....
* In ''Literature/TheDecameron'', on Day 2 Panfilo tells the story of Alatiel, a daughter of the Sultan of Babylon, who is on her way to marry an Iberian king when her ship wrecks. Because of her beauty a succession of men take Alatiel as their lover (no indication of her feelings about all this. There's also a LanguageBarrier). When she is the mistress of the Prince of Morea, the Duke of Athens kills her husband and takes his place in bed with her.
* This occurs in ''[[Literature/ThePrometheanAge Whiskey and Water]]'' by Elizabeth Bear. Matthew Szczegelniak is both a wizard and a virgin, which means that whomever he sleeps with first will gain power. Morgan le Fay has made it clear that she wants this power, so [[BeethovenWasAnAlienSpy Christopher Marlowe]] disguises himself as Matthew and offers to trade his virginity for the TrueName of his adversary. She accepts, teaches him the name, and then reveals that she knew who he was all along, but had reasons of her own for wanting him to know the name.
* In the Creator/RoaldDahl short story "The Great Switcheroo", two neighboring husbands switch places in the night in order to have sex with each other's wives. They go to great lengths to cover--wearing each other's cologne, discussing each other's sexual techniques, etc., and get away with it... sort of. The protagonist's wife comments the next morning at breakfast on how fantastic the sex was last night, when she previously had not been very interested in it. Ouch.
* In Robertson Davies's ''The Lyre of Orpheus'', a man takes the place of a woman's husband in the dark. Probably an allusion to the Arthurian thing, since the novel is all about the completion of an unfinished opera by Creator/ETAHoffmann about Arthur.
* {{Deconstructed}} towards the end of the Literature/SwordOfTruth novel ''Temple of the Winds''. In order to access the titular Temple, Richard and Kahlan are made to marry separate spouses and then consummate their new marriages. Each of them must be sincere, otherwise it doesn't count. Kahlan [[LieBackAndThinkOfEngland lies back and thinks of the Midlands]], but after time passes and the Temple doesn't reveal itself, she decides to try again. After she does, the Temple comes into being and she sees that [[spoiler: it was Richard with her the whole time and he knew it]]. It turns out that [[ProphecyTwist ''this'' was the proper way]] to access the Temple, as it could only be entered by one who has been betrayed completely.
* James Clavell's ''Literature/{{Shogun}}'' features a double-reverse version: after a drunken party, protagonist Blackthorne is visited in the dark by a woman he assumes to be his interpreter Mariko. Next morning, he learns from Mariko that it was in fact one of the maids. However, we later learn that it '''was''' in fact Mariko, who took the place of the maid, but didn't want him to know about it.
* Happens in ''Literature/LambTheGospelAccordingToBiff'' with Biff and Maggie.
* In ''[[Literature/HilaryTamar The Sirens Sang Of Murder]]'' by Sarah Caudwell, one of the protagonists has an intimate rendezvous that gets interrupted by a power outage before it goes anywhere. It later transpires that, unbeknownst to him, the remainder of the rendezvous was with the ''other'' woman spending the night in that particular inn, and [[spoiler: that her husband -- who committed all the other murders in the book out of jealousy -- wants to murder him as well.]] In a bit of a variation, Cantrip greatly admires the second woman and would have been very pleased had he known of the swap.
* In the romance novel ''Midnight Waltz'', the canonical couple get together because the heroine's husband won't consummate their marriage, and so his mother, wanting an heir, persuades a cousin to sneak into the bed. The husband conveniently dies, the deception is revealed, the wife and the trickster couple up.
* In Creator/AngelaCarter's ''Literature/WiseChildren'', there are twin sisters, Dora and Nora Chance. Dora is in love with a man who is in love with Nora. The sisters switch clothes and perfume, and Dora goes to bed with him. She does it twice, and is strongly tempted to tell him the truth and see if he'll marry her, but ultimately decides to leave him (unenlightened) as a memory only.
* In one of S.L. Viehl's ''Literature/StarDoc'' novels, Duncan ends up having sex with Cherijo (whom he previously raped under the influence of a sentient microorganism) while disguised as a [[FishPeople Fish Person]]. It's left ambiguous as to whether or not Cherijo knew (or, at least, suspected) the truth. It helps that they did it doggy-style, so she wasn't really able to see too many details up-close to figure out that he's wearing a disguise. And no, she doesn't mind when she finds out, just like she quickly forgave him for the rape in the first book. They end up getting married. It doesn't look like there are any non-screwed-up people in that 'verse.
* In ''Literature/ThornInMyHeart'', Leona pulls an unintentional one: she doesn't realize Jamie is utterly drunk and thinks she's her sister Rose until he murmurs Rose's name as they're falling asleep afterwards.
* In the backstory of ''Literature/ASongOfIceAndFire'', while Petyr Baelish was [[DrowningMySorrows passed out drunk]] after a feast, Lysa Tully went to his bed in the dark and [[DudeShesLikeInAComa slept with him]]. In his drunken stupor, Petyr mistook her for her sister Catelyn, whom he loved. This results in Petyr thinking for years that Cat had a secret thing for him, and even when Lysa tells him what happened [[spoiler:right before he kills her]] he still claims he loves "only Cat." Subverted in that 1.) it's not clear that Lysa intended to fool him or even knew about the mixup until he whispered Cat's name mid-coitus, and 2.) Petyr later beds Lysa quite willingly, at least once before leaving Riverrun [[UnreliableExpositor if he can be believed]] [[spoiler: and again several times after they're married.]] Petyr is apparently a big believer in the old saying "If you can't be with the one you love, love the one you're with." [[spoiler: As long as they're useful, anyway.]]
* ''I Am Morgan le Fay'', a retelling of Myth/ArthurianLegend (see Religion and Mythology), tells the tale of Igraine's rape by Uther from her point of view. Thus, the BedTrick in question comes off as less "clever trick by Merlin" and more "creepy sexual assault."
* Happens twice in ''Literature/OneHundredYearsOfSolitude''. [[spoiler: Arcadio Buendía is fascinated by Pilar Ternera but he's the only Buendía son that she refuses to sleep with, since she's his ''[[ParentalIncest mother]]'' but Arcadio [[LockedOutofTheLoop doesn't know that.]] Pilar tells him to wait for her in his room one night, but the one who actually goes is a local girl named Santa Sofia de la Piedad, whom Pilar paid so she would take her place. Arcadio realises the deal when she slips into his hammock, but goes along with it anyway; from then on, they stay together and, when Arcadio is executed, Santa Sofia and her children by Arcadio (a daughter and the twin boys she's pregnant with) are taken in by the Buendia family.]] Twenty-something years later, [[spoiler: HookerwithAHeartOfGold Petra Cotes sleeps with the now grown-up twins, Aureliano Segundo and Jose Arcadio Segundo, mistakenly thinking they're the same guy; the deal's revealed when they three contract STD's, and once they get better Aureliano Segundo takes Petra as his mistress and they stay together until his and his brother's deaths.]]
* In Richard Powell's ''Don Quixote, U.S.A.'' Arthur has sex in the dark with (he thinks) his current girlfriend Sally. Doubts set in when Sally slaps him the following morning, but he doesn't find out for certain that it was actually his other love interest Conchita until the end of the book.
* In the Literature/ThursdayNext book ''First Among Sequels'', Thursday's villainous counterpart from the Bookworld impersonates Thursday and sleeps with her husband, Landen. The original Thursday can't reveal the switch without admitting that she had broken a promise by returning to Bookworld. Instead, Thursday discreetly asks Landen what he thought of the sex last night—and he answers along the lines of, "Honestly? You're usually a lot better."
* In the romance novel ''Taken By You'', the hero pulls this on the conniving woman trying to break up him and his wife, by sending in his best friend to bed her (it's dark and they look very much alike). She never finds out and since his friend is as good a lover as he is, she has no complaints about "his" performance either.
* In Sir Philip Sidney's ''Arcadia'', there's a double one, where Pyrocles, disguised as a woman, has Basilius taken in and fall in lust with "her", while his wife Gynecia sees through the disguise and lusts after him. He arranges an assignation with both, to run off with their daughter; when it goes through, Gynecia realizes the truth instantly, but keeps her mouth shut, and Basilius doesn't realize it until after.\\
Though they should have known, Basilius having been warned in a prophecy that he would commit adultery with his own wife.
* In the 18th century novella ''Fantomina'' a young woman disguises herself as ''three different women'' after her lover gets bored of her so as to keep having good sex with him. He doesn't figure it out until she finally gets pregnant and her angry mother forces her to come clean.
* In the backstory of ''Literature/ChroniclesOfTheKencyrath'', Keral (a shapeshifter) bedded Rawneth by pretending to be Greshan--Rawneth's dead sort-of-fiancé--who he'd tricked Rawneth into believing she had raised from the dead. Partway through, he morphed again, revealing himself as… well, we actually don't know for sure, but it's implied he was "revealing" himself as ''someone else'' who he wasn't really.

[[folder:Live Action TV]]
* ''Series/{{Cheers}}''. Woody and Sam get into a little contest in which the winner is the one who kisses Rebecca. She gets wind of it from Carla, and orchestrates so that in the dark, Sam and Woody kiss each other. Both are disgusted, but Woody makes Sam uncomfortable when he asks him to rate his kissing ability.
* ''Series/BuffyTheVampireSlayer''. Faith slept with Riley while she was [[GrandTheftMe in Buffy's body]]. This causes friction in Riley's and Buffy's relationship when Buffy finds out (mostly about [[DoubleStandardRapeFemaleOnMale how Riley is a bad boyfriend for not noticing]]) as well as her vengeance filled quest to kill Faith in ''Series/{{Angel}}''.
* In ''Series/{{Battlestar Galactica|2003}}'':
** During Season One, Athena pretends to be Boomer to seduce Helo into getting her pregnant on Caprica. Not too hard, since as the same model Cylon they look identical.
** The same principle is at work when, in the Season Four episode "Someone to Watch Over Me", [[spoiler:Boomer pretends to be Athena in order not to be found out by Helo, who wants to have some goodbye sex. WordOfGod is that she also did to spite Athena. Athena remarks on the irony in the extended version of "Islanded in a Stream of Stars"]].
* ''Series/{{Friends}}'':
** Attempted by Chandler in the episode "The One With Five Steaks and an Eggplant." When a mysterious woman leaves a message on his machine looking for her old lover Bob, Chandler pretends to be Bob and makes a date with her. He then consoles her when "Bob" doesn't show up, and they sleep together. Later, Chandler is HoistByHisOwnPetard when the woman calls the machine and tells "Bob" that Chandler is nothing compared to him in bed.
** In the episode "The One With The Stain", Phoebe is dating her twin sister's ex-fiance, and said twin sister pretends to be Phoebe in order to sleep with him.
* In ''Series/TheClass'', Kat and Ethan pretend to be other people's blind dates at a bar. Kat does this successfully, but Ethan does not understand the concept and attempts to pursue a relationship with the woman, all the while pretending to be Dan Slutsky.
* An unintentional one in ''Series/{{Frasier}}''. Niles intends to have sex with his wife Maris, their marriage counselor also intends to have sex with Maris, and Niles and the marriage counselor end up in the same bed each thinking the other is Maris until the lights come on and they see that neither one is Maris before they actually do anything. Later, Niles claims his first tip-off was the heat coming from the other side of the bed.
* In the fourth season of ''Series/ArrestedDevelopment'' Ann Veal pulls off an elaborate, comic bed-trick, separately telling both Gob and Tony that she will sleep with them, and claiming that she'll be wearing a mask. She then leaves the two of them to have sex with each other, while wearing masks.
* In ''Series/{{Soap}}'', Burt Campbell is kidnapped by aliens, and replaced by a double. This alien sleeps with Mary, Burt's wife, several times while Burt is away.
** In series four, married couple Eunice and Dutch are trying to spark up their sex life by role-playing. When they discuss various ideas Eunice asks him why doesn't he do what he did last week: dress up like a burglar, climb in through the bedroom window, remain completely silent, have sex with her and then leave, while taking a piece of her jewellery. She comments that while taking the jewellery away was a nice touch, he should really give it back. He has absolutely no idea what she's talking about and, once she realises it was an actual burglar, she pretends that she made the whole story up... and, once Dutch leaves the room, waves another piece of jewellery outside the window whilst shouting for the burglar's attention. While the burglar went in with no intention of going after Eunice, he certainly took advantage of the situation once she mistook him.
** In another episode Jessica has a defense attorney(played by Howard Hesseman) who quits on her because he doesn't think he can win. A few episodes later he's back as the prosecutor. When questioned about how he could be both at the same time he explains that he has a twin brother and everyone always confuses them. He then mentions "last year we played quite a trick on our wives!"
* ''Series/GossipGirl'''s Chuck Bass pretends to be Blair Waldorf's English boyfriend during a blackout in order to get to sleep with her. Subverted in that they are interrupted by the real boyfriend before they can go any further than making out, and Blair knew all along that it was Chuck.
* In the ''Series/SpartacusBloodAndSand'' episode "Whore", [[spoiler: Licinia attempts to purchase Spartacus's sexual services and Illithya attempts to purchase Crixus's, but jealous Lucretia instead pairs up Spartacus and Illithya, who are mortal enemies. The whole subterfuge is made easier by masks and gold paint.]] And the fallout includes both duped characters going into a [[BerserkButton murderous rage]].
* In ''Series/HowIMetYourMother'':
** At one point, Barney pretends to be Ted in order to seduce a woman. Although this isn't a straight example as he's just using Ted's name (and job) on women who've never met either of them.
** On another occasion we learn that Barney apparently slept with a woman twice, once as himself, and once as his EvilTwin "Larney".
* Inverted on ''Series/FamilyMatters'' when Stefan (who was going out with Laura) pretended to be Steve to discover if Laura had feelings for Steve. To his shock, Laura comes onto him [[spoiler: to screw with him, then reveals she wasn't fooled by him at all and was angry that he'd suspect that of her.]]
* On ''Series/{{Smallville}}'', Lana's nutty shapeshifting stalker Tina Greer took Clark's shape and declared his love to Lana and they kissed before the real Clark interrupted them.
** Five seasons later, Lana sleeps with Bizarro thinking he's Clark.
* ''WildNOut'' had a skit with Music/NeYo in which the black team sung about portraying his bodyguards. One of the comedians/bodyguards sung about a Ne-Yo groupie who would only sleep with him if she got with Ne-Yo first: he took her into a dark room with just him & her. After it was over, he told her "It's not Ne-Yo, it's me, ho."
* In the third season of ''Series/{{Fringe}}'' [[spoiler: Olivia is replaced with her MirrorUniverse counterpart, who sleeps with Peter.]]
* This trope occurs twice in ''Series/TheXFiles''
** In "Small Potatoes", a shape-shifting man impregnates several women while impersonating their husbands, impregnates his ex-girlfriend by impersonating Luke Skywalker (no, not Mark Hamil, the character from the movie), and later transforms himself into Mulder first to avoid being arrested, and then uses his appearance to try to seduce Scully. She doesn't notice (to be fair, there was wine involved) and almost kisses the non-Mulder before the real Mulder bursts in. Scully, obviously, is not amused. Notably, this is ''treated'' as rape (unlike many examples here) with the man registered as a sex offender and behind bars at the end of the episode.
** In "Dreamland", Mulder switches bodies with an MIB, who decides to try and seduce Scully. This time, though, she ''does'' notice that it's not Mulder because the MIB acts nothing like Mulder--including slapping her butt, calling her "Dana", and ''deferring to Skinner''. She tricks him into [[ChainedToABed handcuffing himself to Mulder's bed]], and warns him if he called her "baby" again, he'd be "peeing through a catheter."
* On ''Series/TrueBlood'', Tommy acquires the power to shapeshift into other people and accidentally shifts into Sam, his brother. After spending the day impersonating Sam while he was out on business, Sam's girlfriend Luna shows up to consummate their relationship. To Tommy's credit, he ''does'' resist her at first and says they shouldn't. But as soon as she took off her top, what little resolve he had died quickly. Nonetheless, Sam is ''furious'' when he finds out and kicks Tommy out of his home.
** This results in RedemptionEqualsDeath, though, as Tommy decides to take Sam's place when meeting Marcus, Luna's ex, an alpha werewolf. Tommy shifts into Sam and, being his usual JerkAss self, infuriates the ex and gets himself beat up so badly that he dies shortly after.
* A borderline example from ''Series/{{Crownies}}'': a woman dresses up very provocatively for a blind date set up by a friend, with someone whose been told is an attractive dentist called Phil. Around the time she's expecting him, an average-looking campaign worker who has been going door-to-door stops by. Before he can get a word in, she asks "Are you Phil?" DistractedByTheSexy, he impulsively answers "Yes." She proceeds to sleep with him, even though he's nowhere near as attractive as she was led to believe Phil is, and never makes an effort to pretend to be the man she was expecting beyond lying about his name - the implication is that she never gave him a chance to talk after that. When the real Phil shows up, she reports the campaigner to the police and then to the Crown Prosecution Service. Though Richard acknowledges the man's actions could constitute rape by fraud, most of the characters are just dumbfounded by the fact that the woman slept with him for no reason beyond "He said he was Phil." Whether or not the man was charged is left unrevealed by the end of the episode.
* Often a component of soaps DoubleStandardRapeFemaleOnMale storylines. The woman often drugs the man or gets him drunk, then disguises herself as his wife or girlfriend:
** On ''Series/{{Passions}}'', a girl uses a magic spell to literally morph her appearance into that of the man's girlfriend.
** On ''Series/AsTheWorldTurns'', a man sleeps with his wife's twin.
** Subverted on ''Series/TheYoungAndTheRestless'', where the man gets drunk on his own accord but the other woman in question deliberately does not protest (she wants him for herself) when he begins to make advances to her.
** In one of the few male on female examples on soaps, on ''Series/SunsetBeach'' a man's evil twin seduce his unaware fiancee, all the while forcing the man to watch through a two-way mirror. She's sickened and horrified when she realizes what has happened.
** Another example on ''Series/PortCharles'', where an amnesia-stricken Lucy is seduced by her boyfriend's archenemy. The man does this knowing full well that Lucy has no idea who ''she'' is, much less him, and convinces her that they're lovers, all for the purpose of humiliating her and taunting her boyfriend. After her memory returns, her enraged boyfriend calls him a rapist, but it's never taken any further (pressing charges, counseling, etc)
** ''Series/AllMyChildren'' has an example where the (drunk) man genuinely does not realize that the woman (doped up on pain medication) doesn't know she's with someone other than her husband and feels genuinely horrible at the realization of what's happened.
* An episode of ''Series/FXTheSeries'' has an old enemy of Rollie's do that with his love interest. He then taunts her with "Every time you'll see Tyler, you'll remember me."
* Subverted in ''Series/{{Neighbours}}'', both because whatever they did in a dark storeroom was something you can do standing up and fully clothed, and because after much drama the boyfriend-impostor turned out to have been the boyfriend after all.
* A rather strange example goes down in ''{{Series/Heroes}}''. In the final season, Sylar makes love with Parkman's wife when she thinks it's Matt. [[spoiler:It's Matt's ''body'', but the one in charge is Sylar.]]
* Borderline example in the final season of ''Series/StarTrekDeepSpaceNine''. Winn Adami takes her new spiritual guide to her bed. Later, she discovers he is actually [[spoiler:Dukat, the architect of the Bajoran occupation and genocide, in disguise.]] Borderline since Dukat wasn't impersonating a previously existing character, but had created a completely new false identity. There's no way she would sleep with him (or any Cardassian) normally though.
** Earlier, a MirrorUniverse episode had Benjamin Sisko taking over for his counterpart in the Terran resistance who was missing and presumed dead. Jadzia Dax's mirror counterpart being his mistress, she insists on taking Sisko to bed with her on his return. The next time he pays a visit to her universe, [[WhatTheHellHero she takes him to task for this]], saying "You made love to me under false pretenses!"
* In ''Series/OrphanBlack'', after stealing the deceased Beth's identity, Sarah sleeps with Beth's boyfriend, Paul, tricking him by virtue of looking exactly like Beth. She does it in part because she can, but mostly as a way of convincing him that she's Beth. [[DeconstructedTrope Deconstructed]] as Sarah's enthusiasm is actually a clue that leads Paul to figure out the truth. Then, to complicate things, Paul falls for Fake!Beth. [[spoiler:Once the secret is out, he transfers his feelings to Sarah, and the two have moved into a genuine relationship. Just before making a HeroicSacrifice, he tells Sarah that he never loved Beth, but he did love her]].
* {{Played with}} in ''Series/{{Misfits}}''. An 82-year-old woman is turned into her younger self by the storm that gave the Misfits their powers. She seduces Nathan and eventually sleeps with him. He realizes this when she begins to shapeshift back into her older self while they are having sex. Although she didn't pretend to be anyone he knew, she still wasn't somebody he would've slept with normally.
* [[spoiler:Adalind]] pulls this on [[spoiler:Nick]] in ''Series/{{Grimm}}'' with a spell that makes her appear like [[spoiler:Juliette]]. Neither [[spoiler:Nick]] nor [[spoiler:Juliette]] are amused once the truth is revealed, especially when it's discovered that [[spoiler:she did this to [[BroughtDownToNormal remove Nick's Grimm abilities]]]].\\
Unfortunately for everyone involved, [[spoiler: the cure for this literally drives Juliette insane]]. And [[spoiler:Adalind somehow ''got pregnant''. Again. With her literal archnemesis, who she has screwed over for four years. Strangely enough, Adalind and Nick eventually get together for good, while Juliette (now calling herself Eve) becomes a cold, calculating killing machine working for a secret government agency.]]
* Series/LegendOfTheSeeker: Panis Rahl disguised himself as a young shepherd to seduce Richard and Jennsen's mother before they had sex.
* ''Series/MarriedWithChildren'' Seeking revenge on a girl who's been stringing him along, Bud convinces the guy she's really interested in (and who could care less about her) to go along with his plan--entice the girl into meeting him under the bleachers for a round of quickie sex. Later, the girl is seen emerging from the bleachers, adjusting her clothes, apparently completely unaware--thanks to the darkness--that she just had sex with ''Bud'', who the audience soon sees coming out a few minutes after she did.
* In an episode of ''The Grinder'', the guys watch an episode of the ShowWithinAShow where Grinder uses a [[LatexPerfection rubber mask]] to pose as a British attorney. When Stewart points out that Grinder had sex with the real attorney's wife while posing as him, which is illegal, his dad simply responds by saying "[[EuropeansAreKinky Not in Europe]]."
* In ''Series/That70sShow'', Fez tries multiple times in one episode to arrange for himself to be switched with a friend in a dark room so he can have sex with their girlfriends.
* In ''Series/{{Roswell}}'', shape-shifting alien Nasedo is impersonating a man he'd killed, and he reveals he's been doing this to a woman the dead man was involved with. Nasedo is an acknowledged villain both in-show and out, but neither the aliens nor humans he reveals this to have any reaction one way or another. Even if they have no sympathy for the woman due to her own antagonistic status, disgust for him doing it and an acknowledgement it's wrong would have been nice.
* The plot of an entire episode in Series/{{Kaamelott}}. After Ygraine explained to Guinevere how Arthur was conceived (see Religion&Mythology), she refuses to let Arthur in her bed again unless he can prove it's really him and not another, his best friend for example. This being a comedy, Arthur is too uninterested in his wife to recall any secret only the two of them would share, but it doesn't matter in the end because they never consummated. [[TheCuckoolanderWasRight At the end of the episode, Lancelot is seen asking Merlin about the trick]], but gives up when Merlin asks him who he wants to impersonate.
* ''Series/MidsomerMurders'' had an episode with a pair of physically identical twins played by James Callis. It comes out at the end of the episode that [[spoiler: one of the twins had failed at conceiving a child with his wife, so he sent his brother to have a go - successfully - without her knowledge]].
* It's happened twice thus far on ''Series/OnceUponATime'': once in season 4/5 by Zelena, who had disguised herself as Robin's wife Marian, and once in season 7 when [[spoiler: Gothel disguises herself as Rapunzel to convince the alternate Hook to sleep with her]]. Both situations result in pregnancies, though thus far only Robin was able to properly call out his attacker for her actions. In a twist of irony, [[spoiler: the daughters resulting from these Bed Tricks are now in love with each other]].

* A just ''bizarre'' variation in ''Wormwood: A Serialized Mystery'', which introduces a [[OurGhostsAreDifferent ghost]] who acts as an [[HornyDevils incubus]] by entering his victim's psyche and [[MakesJustAsMuchSenseInContext impersonating whatever celebrity/fantasy/unrequited love she requests]].

[[folder: Religion and Mythology]]
* The Literature/BookOfGenesis has a few examples:
** Laban substitutes his older daughter Leah for his younger daughter Rachel when Jacob [[BrideAndSwitch thinks he's marrying the latter]]. After quite the "battle of wills" between both men, Jacob eventually marries them both.
** Tamar, a widow of Judah's sons, was due a marriage to another man of the family under the rules of levirate marriage. When it seemed Judah was not going to go through with this Tamar disguised herself as a prostitute and met him on the road, taking his staff and sigil as payment. She conceived twins and, when Judah realized what had happened and she explained her reasons, he was shamed into admitting his mistakes and, while he didn't marry her, he did acknowledge the twins as his children and heirs.
* According to the ''Literature/{{Talmud}}'', King David was conceived this way. His father, Jesse, was the grandson of a Moabite convert woman, and eventually became concerned that this made his marriage to a full-blooded Hebrew improper (Moabites are forbidden to marry Hebrews, though there was debate on whether or not this applied to women).[[note]]It should be noted that his grandmother, Ruth, was a convert (and therefore a Jewess under the Law) at the time his father Obed was conceived. She was legally recognized as a widow entitled to the law of levirate marriage, and her second husband (and Jesse's grandfather), Boaz, made sure that all the protocols were followed before marrying her. So probably no reason for Jesse not to marry Nitzevet.[[/note]] He decided to forgo sexual relations with his wife, Nitzevet, but, wanting more sons, took his Canaanite servant as a concubine (since Canaanites are allowed to have relationship with Hebrews ''and'' Midianites). Nitzevet arranged to take the servant's place and conceived David, though Jesse and his sons spent years assuming that she had had an affair.
* In [[Myth/KingArthur Arthurian legend]]:
** Arthur is conceived when Uther Pendragon disguises himself as Gorlois of Cornwall to sleep with Ygraine. In the movie ''Excalibur'', Morgana (Morgan Le Fey) who was about 8 or so, saw through the magic that Merlin was using to help Uther rape her mother. She later calls Merlin out on it when she has him immobilized in her cave.
** Also, Elaine magically disguises herself as Guinevere in order to sleep with Lancelot. Their liaison results in the birth of the sinless, pious Galahad who achieves the Grail Quest -- but in some versions it also causes Lancelot to fall from grace.
*** This is done in ''Literature/TheOnceAndFutureKing'' sans magic. Twice. While the first time has the excuse that Lancelot was incredibly drunk and thus mistook Elaine for Guinevere, the second time (during which he was perfectly sober and ''knew'' the queen wouldn't call him to her chambers as long as Elaine was in the castle) really didn't have much besides it being dark. Guinevere sure doesn't buy it.
** Though the original Arthurian myths usually show the incest between Arthur and one of his sisters as being a case of unknowing incest, modern retellings often rework it as this trope. An example would be ''Literature/TheMistsOfAvalon'' where Viviane sets up a tryst between Arthur and Morgan, knowing full well who they are in relation to each other, and when called on it she doesn't see what they're so upset about.
* In Myth/ClassicalMythology, Zeus does this several times in his bid to bed attractive women he lays eyes on (besides his very frequent use of harmless-seeming animal disguises to get close to his victims, as well as taking the shape of Artemis to rape Callisto, one of her nymphs).
** He disguises himself as Amphitryon, sleeps with Alcmene, and begets Herakles/Hercules. The real Amphitryon apparently took this pretty well--if Zeus wants to sleep with someone, [[DoubleStandardRapeDivineOnMortal he will]], but at least his wife was faithful enough that Zeus had to trick her.
** With Persephone, he disguises himself as Hades (his own older brother) and seduces her, producing Melinoe, goddess of ghosts. Pre-Orphic Hymns argue that this was not originally the stories of Melinoe and Zagreus and that they were changed to fit that particular cult.
* The ''Literature/{{Mabinogion}}'':
** The original contains an inversion: Pwyll spends a year disguised as Arawn, so that he can kill Arawn's enemy. Arawn ''expects'' Pwyll to sleep with his queen, but he refuses her.
** The Evangeline Walton retelling adds a straight example to counterbalance this; Pwyll is said to be infertile as the result of the time he spent in the underworld, and "his" son Pryderi is actually Manawyddan's son, conceived while Manawyddan is disguised as Pwyll.
* The ''Literature/VolsungaSaga'' gives us a double-whammy: Signy disguises herself as a witch and sleeps with [[BrotherSisterIncest her brother Sigmund]] in order to conceive a son who is strong enough to avenge her father and brothers. The result is the fearsome Sinfjotli.
* In the ''Literature/{{Nibelungenlied}}'', Siegfried pretends to be King Gunther to get into bed with Brunhild, his wife. However the twist is that Siegfried did this on Gunther's orders since Brunhild is very protective of her virginity as her superhuman strength comes from it. Gunther needed Siegfried to get into her bed and beat her half to death before he consummated his marriage with her.

[[folder:Opera and Theater]]
* [[Creator/WilliamShakespeare Shakespeare]] just loves this trope. Interestingly however he always uses it to get reluctant married people into bed together. For example:
** In ''Theatre/AllsWellThatEndsWell'', Bertram won't accept Helena as his wife until she can become pregnant by him; she discovers an assignation between him and Diana, and convinces Diana to let her go instead.
** In ''Theatre/MeasureForMeasure'', Angelo attempts to use the ScarpiaUltimatum on Isabella; she convinces Angelo's rejected fiancée Mariana, who still loves him, to go in her place.
* This seems to be Susanna's and the Countess's plan in ''Theatre/TheMarriageOfFigaro'': the Count has an assignation with Susanna and the Countess shows up to it in Susanna's clothing. It doesn't quite get that far before the Count sees Figaro attempting to seduce the woman he thinks is the Countess, though.
* ''Theatre/DonGiovanni'' as well, when the eponymous villain protagonist tries to seduce Elvira's maid by switching clothes with his servant. Partly to make sure the already-seduced Elvira wouldn't cause any trouble, partly because he guessed correctly that a servant girl wouldn't consider a noble's intentions with her very noble.
* The main female character (one [[MurderIsTheBestSolution hesitates]] [[FaceHeelTurn to]] [[SexIsEvil call]] [[UnholyMatrimony her]] [[MoralEventHorizon a heroine]]) of Middleton's ''The Changeling'' pulls a ''reverse'' bed trick, convincing a maidservant to take her place on her wedding night so that her husband won't discover that she isn't a virgin.
* In [[Creator/NiccoloMachiavelli Machiavelli’s]] play ''The Mandrake'' the entire plot revolves around a scheme to pull of one of this so that Callimaco can sleep with the beautiful, virtuous and married Lucrezia.

[[folder:Tabletop Games]]
* Some D&D settings, including ''TabletopGame/{{Ravenloft}}'' and ''TabletopGame/ForgottenRealms'', depict the entire doppelganger race as reproducing via the BedTrick. A few Changelings do the same thing in TabletopGame/{{Eberron}} -- this has led to rumors that they are actually related to the doppelganger race.
* The circumstances of iconic [[MagicKnight magus]] [[JerkassWoobie Seltyiel's]] [[ChildByRape conception]] in ''TabletopGame/{{Pathfinder}}''.

[[folder:Video Games]]
* Part of the plot of ''VideoGame/GrandTheftAutoSanAndreas'' involves robbing a casino. The game's protagonist, CJ, pulls a kinkier-than-normal version of this as part of the heist. They need a keycard from one of the casino staff in order to pull it off, so he decides to get one by seducing a female croupier who works there, Millie. Of course, she doesn't know him yet, so his plan to remedy this is to shadow her after she leaves work and look for an opportunity. Said opportunity comes when she visits a sex shop and buys some fetish wear. By eavesdropping on her making a phone call, CJ learns that she's buying the clothes for a BDSM play session with a guy. CJ buys a gimp suit that covers his entire body and face, and then trails Millie home, where he waits for the guy to show up. When the guy arrives, CJ ambushes him and enters the house in his place, wearing the gimp suit. Millie thinks that CJ is her boyfriend and is eager to be punished by him. (This is peculiar, since gimp suits are normally worn by submissives rather than dominants, but never mind.) He obliges. Afterwards, she finds out that the guy she did all that stuff with was CJ and not her usual partner. Astonishingly, she has no problem with any of what CJ did, and becomes his regular girlfriend. She's also willing to lend him her keycard after going out for a little while, in exchange for a share of the stolen money.

* All the female leads of ''Webcomic/OlympicDames'' dreamt they had an encounter with a cute guy they had met that day. They were actually visited by different [[DoubleStandardRapeDivineOnMortal Greek gods]].
* A king considers this in ''Webcomic/{{Oglaf}}'', then decides it would be simpler to just have the wizard turn into a copy of the woman he desires. Said wizard is not happy about this.
** This is a parody of the Arthurian legend above. It turns into a BrickJoke later when the wizard transforms into the king to meet the demand of a HardGay warrior who demands sex with the king as the price for crossing a bridge.
* Being a retelling of Myth/KingArthur, ''Webcomic/ArthurKingOfTimeAndSpace'' naturally does [[http://www.arthurkingoftimeandspace.com/0445.htm Uther/Ygraine]]. It turns out [[http://www.arthurkingoftimeandspace.com/0448.htm they were soulmates, and Ygraine only married Gorlois because the force of her feelings for Uther were scary]].
** And again with [[http://www.arthurkingoftimeandspace.com/1078.htm Lancelot and Elaine]], who [[http://www.arthurkingoftimeandspace.com/1104.htm definitely aren't soulmates]], although [[http://www.arthurkingoftimeandspace.com/1362.htm Guenevere]] [[http://www.arthurkingoftimeandspace.com/1409.htm has her doubts]].
* The hero and AuthorAvatar of ''Webcomic/{{Sonichu}}'' travels into the future in one chapter, where finds his future wife, tricks her into thinking he is his future self, and has sex with her. He then promptly goes back in his own time where he is single again so he can make out with [[WesternAnimation/FamilyGuy Meg Griffin]].
* Abel's backstory in ''Webcomic/DanAndMabsFurryAdventures'' involves this when his father is revealed to be an incubus who killed his mother's real husband and has been impersonating him ''all these years''.
* In one storyarc of ''Webcomic/BiggerThanCheeses'', Duke's wife Natalie reveals that she was on the lam for an entire year and had been impersonated by her identical twin sister. Duke claims that can't be true since he's been sleeping with Natalie for a whole year...he trails off as he realizes what he just said and what it meant.

[[folder:Web Original]]
* In ''Roleplay/TheGamersAlliance'', the goddess Hivena takes the elfess Rhylian's shape in order to fool Rhylian's paladin boyfriend Nesa to sleep with her.
* #5 of Website/{{Cracked}}'s "6 Romantic Movie Gestures That Can Get You Prison Time".
* In ''[[VideoGame/TheTraderOfStories Bell's Heart]]'' the ghost in the lake was on the receiving end of this, which [[DrivenToSuicide resulted in him becoming the ghost]].

[[folder:Western Animation]]
* In the ''WesternAnimation/JusticeLeagueUnlimited'' episode "The Great Brain Robbery," Lex Luthor [[FreakyFridayFlip switches bodies]] with the Flash. The Flash, while posing as Luthor, is implied to have had sex with Luthor's girlfriend Tala. Tala is the one who initiates it, and she clearly enjoys it, [[GoodPeopleHaveGoodSex even remarking that Lex is being a far more sensitive and attentive lover than usual]], but she is having sex with a stranger and enemy who has fooled her into thinking that he's really her boyfriend. Flash most likely went along with it because otherwise he might have been discovered. At the end of the episode, Lex returns to his own body, and Tala is visibly disappointed to have him back.
* Used as much as Disney allows (kisses only, and not shown) and subverted in ''WesternAnimation/AmericanDragonJakeLong'': Spud tries to lure Stacy in a closet with an anonymous note, but she lost it without reading it and Trixie got it and thought it was from the guy she had the hots for. HilarityEnsues when they realizes WHO they were kissing.
* One episode of ''WesternAnimation/AmericanDad'' had Stan's body double try to get Francine into bed. Unluckily for him, the real Stan got home minutes later.
* In ''WesternAnimation/{{Duckman}}'', the eponymous character, who in an ActorAllusion, is said to have had been with a blind ''Series/{{Seinfeld}}''-obsessed woman who thought he was Jason Alexander in a duck suit.

%% No real life examples on rape tropes. Seriously.