History Main / NaughtyByNight

->''You know her by day\\
But you don't know Karen by night''

* ''Series/{{Angel}}us'' hints that cute geek girl Fred is like this.

Get Sarah home to her significant other, however, and well -- the [[DressHitsFloor blouse is going to be on the floor]], the skirt in the hall, her [[LettingHerHairDown hair all over the place]]... and the rest is too {{NSFW}} even to describe. As strait-laced as Alice may be in public, none of that carries over into her private life -- and vice versa.

Alice is a [[HotLibrarian librarian]]. During the day, she wears long skirts, a loose blouse done all the way up to her neck, her hair in a bun and sensible shoes.

Get Alice home to her significant other, however, and well -- the [[DressHitsFloor blouse is going to be on the floor]], the skirt in the hall, her [[LettingHerHairDown hair all over the place]]... and the rest is too {{NSFW}} even to describe. As strait-laced as Alice may be in public, none of that carries over into her private life -- and vice versa.

Nina is a [[HotLibrarian librarian]]. During the day, she wears long skirts, a loose blouse done all the way up to her neck, her hair in a bun and sensible shoes.

Get Nina home to her significant other, however, and well -- the [[DressHitsFloor blouse is going to be on the floor]], the skirt in the hall, her [[LettingHerHairDown hair all over the place]]... and the rest is too {{NSFW}} even to describe. As strait-laced as Nina may be in public, none of that carries over into her private life -- and vice versa.

** ''Fanfic/AdviceFromPinkiePie'' puts Fluttershy in a BDSM relationship - as the ''dominant'' one - with Rainbow Dash ("Now, my little pony… you're going to love me."), while in ''[[http://www.fimfiction.net/story/12708/my-little-slave My Little Slave]]'', [[spoiler: she initiates a rape-dungeon roleplay that lasts for 29 chapters before the reader finds out the truth]].
** ''[[Fanfic/TheDearSweetieBelleContinuity Morning Glory]]'' downplays it, as she's embarrassed afterward even in private, but [[spoiler:she didn't need the Apples' "honeymoon cider" after all to go wild with Big Mac- [[ShipperOnDeck she left it for Applejack and Rainbow Dash's unwitting use]]]].

* ''Series/TwinPeaks'' - Laura Palmer is a normal high school girl by day, but a prostitute at night, among other things. Or, as she says in Main/TheMovie, "Night time is my time."

* the Music/GoodCharlotte song ''Like it's her Birthday'' has this as the main theme - the Protagonist thinks his Girlfriend's cheating on him when she lies about where she's going, so he follows her and...

* In ''QuantumAndWoody'', Amy Fishbein appears to be a prim and proper white-collar professional, but she starts dropping {{Anvilicious}} innuendos and [[DressHitsFloor undressing herself]] as soon as she's alone with Woody.

* In the {{ecchi}} manga ''MyBalls'', the main character's primary love interest Minayo is a sweet, kindly young woman who works at a daycare center. When she gets drunk, however, she goes into what the protagonist describes as "full-blown nympho mode". Unfortunately, said protagonist can't have sex for a month or the demon sealed inside his balls (hence the name of the manga) will be released and cause {{The End of the World As We Know It}}. Minayo happens to be an alcoholic, and HilarityEnsues.

* ''{{Paprika}}'': Straight-laced Chiba becomes a lot more flirty and extroverted when she turns into [[spoiler: Paprika]].

* In the manga ''CrimsonSpell'' the protagonist is under a strange curse that causes him to turn into a [[HornyDevil Demon]] that can only be vanquished by being ''raped'' into submission. Conveniently he never has any memory of this the next day.

* The essence of ''TheStrangeCaseOfDrJekyllAndMrHyde''. Jekyll is an upstanding citizen by day, but he becomes Mister Hyde by night in order to live out his immoral, sadistic fantasies without being recognized.

* Almost every Cairheinan noblewoman in the ''WheelOfTime'' is heavily implied to fit this trope. Though during some festivals they will run around almost nude on the streets, especially during the Feast of Light (during which normal prohibitions against inter-class kissing (and other things) are lifted), leading to a large number of commoners having bragging contests about who made out with the most important noblewoman.

* Angel in the 1984 {{Sexploitation}} film ''Film/{{Angel}}'' and its sequels. The tagline for the original movie was "High School Honor Student By Day. Hollywood Hooker By Night".

* ''Anime/CodeGeass'''s [[HotScientist Nina]] [[MeaningfulName Einstein]] and the infamous [[CargoShip table scene]]. Nunnally actually ''walked in on this'', but fortunately she was blind already and ([[WiseBeyondTheirYears hopefully]]) too young to properly...''interpret'' any sounds she might have heard.

* ''OnTheBuses'' long-suffering Olive would love to be Naughty By Night, but her miserable husband Arthur would rather sleep. Actually, he'd probably rather do his taxes...
* Effy from ''{{Skins}}'': innocent schoolgirl by day, FilleFatale by night.
* Sheila from the US version of ''{{Shameless}}''. By day she's a sweet agoraphobic and germaphobic housewife. But at night she is very very into pegging filthy alcoholic Frank.

* The play ''MissJulie'' fits this with regard to personality, but replace "librarian" with "aristocrat".

* The song "Miss Byrd" from ''CloserThanEver'' is about a secretary exulting in how no one who sees her would think that she's anything but "that dull Miss Byrd," yet she has secret trysts with her superintendent.
* Parodied in ''TheMusicMan'': The town gossips manage to convince the Professor that [[HotLibrarian Marian the Librarian]] is NaughtyByNight primarily because she reads "racy" books by "Chaucer...Rabelais...[[Creator/HonoreDeBalzac Balzac]]" and was kind enough to befriend the town outcast. She's not, but he falls in love with her anyway.

* In ''{{Futurama}}'', a prim bureaucrat is utterly turned on after hours by Fry's horrifyingly slobby lifestyle.

* ''Anime/ParanoiaAgent'' has an episode that plays with this. Harumi Chono is a quiet, conservative, mild-mannered school teacher by day, but at night her [[SplitPersonality other personality]] takes over--Maria, a popular prostitute. When Harumi gets engaged, she starts to desperately get rid of Maria before her wedding day, which causes Maria to fight back.

* ''Anime/CodeGeass'''s [[HotScientist Nina]] [[MeaningfulName Einstein]] and the infamous [[CargoShip table scene]]. Nunnally actually ''walked in on this'', but fortunately she was blind already.
** And thank god, Nunnally's (''probably'') too young to properly...''interpret'' any sounds she might have heard.
*** Then again, said girl is [[WiseBeyondTheirYears Wise Beyond Her Years]]...

Get Nina home to her significant other, allow her to have [[InVinoVeritas a glass of something alcoholic]] and well... the [[DressHitsFloor blouse is on the floor]], the skirt is in the hall and the [[LettingHerHairDown hair is all over the place]]. Some other stuff is {{NSFW}} even to describe...

-->-- '''Jill Sobule''', "Karen by Night"

* Parodied in ''TheMusicMan'': The town gossips manage to convince the Professor that [[HotLibrarian Marian the Librarian]] is NaughtyByNight primarily because she reads "racy" books by "Chaucer...Rabelais...Balzac" and was kind enough to befriend the town outcast. She's not, but he falls in love with her anyway.

* In [[FanFic/APikachuInLove A Pikachu in Love]], Pikachu is worried that this is what Ash and Co. will think if they catch him sneaking off at night to meet Pichi, and doesn't want them drilling him for questions on the matter. [[spoiler: That still doesn't stop Misty from finding out, though she doesn't press the matter and keeps it a secret from the others even after the ending.]]

* ''Looking for Mr. Goodbar'' is a very dark example. Diane Keaton plays a teacher of deaf childen from a conservative Irish-Catholic upbringing who starts out having an affair with a married college professor, then starts cruising seedy bars for one-night stands that grow progressively more degrading and dangerous, culminating in her getting raped, beaten, and stabbed to death by a troubled Vietnam vet.

[[folder:Music]]
* the Music/GoodCharlotte song ''Like it's her Birthday'' has this as the main theme - the Protagonist thinks his Girlfriend's cheating on him when she lies about where she's going, so he follows her and...
-->''"Tonight I kinda get the feeling/My girl is up to something, Something that is no good/ She said she only had a meeting/ But she is dressed for something, Something that is no good/ [[YourCheatingHeart Now I'm not saying that she's cheating,]] But seeing is believing/ [[InVinoVeritas Can't believe it, What I'm seeing when I stepped inside.]]"''

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* The essence of ''TheStrangeCaseOfDoctorJekyllAndMisterHyde''. Jekyll is an upstanding citizen by day, but he becomes Mister Hyde by night in order to live out his immoral, sadistic fantasies without being recognized.

-->''You know her by day\\

--->--'''Music/JillSobule''', "Karen by Night"

* The movie ''{{Belle de Jour}}'' is about a seemingly average housewife who's a prostitute in secret. But here this trope is inverted: as she is a housewife, she can actually do this job only ''by day'' instead of by night. (This is where the name of the film comes from.)
* The [[HeroesWantRedHeads red-headed librarian]] from ''{{Tomcats}}'' looks like a plain, uptight young lady. She (and her grandma!) are also into S&M.

* Somewhat subverted in the film ''{{Blind Date}}'' where BruceWillis' sister-in-law tells him not to let the date get drunk as she goes wild. This information is relayed to him via his brother who adds lots of leering to the information. Cue the man getting his date (Kim Basinger) drunk, to find that she goes wild in a drunk-driving, crash-the-car, ruin-the-evening way.

* ''Looking for Mr. Goodbar'' is a very dark example. Diane Keaton plays a teacher of deaf childen who starts out having an affair with a married college professor, then starts cruising seedy bars for one-night stands that grow progressively more degrading and dangerous, culminating in her getting raped, beaten, and stabbed to death by a troubled Vietnam vet.

[[folder:Real Life]]
* Ever hear the phrase "a lady on the streets and a freak in the sheets?"
** In Mexico it is said that the perfect wife is "a saint at church, a lady at the table and a whore in bed"
** It used to be "Paris in the bedroom, Boston in the parlor", implying Boston the classy one instead of Paris. Both cities have reputations for being on the up and up while simultaneously being {{Wretched Hive}}s.
*** Boston is supposed to uptight, prudish, and hypocritical, like the rest of America. [[EuropeansAreKinky Paris is European and casual.]] As Marlene Dietrich once put it, "In America sex is an obsession. In Europe it is a fact of life."
*** "Boston Brahmins" were prim, proper, and probably born knowing the Blue Laws, attributed (accurately or not) to their Puritan ancestors. There's also the expression [[BannedInChina "banned in Boston"]], implying something was especially racy. A DeadHorseTrope now, by and large, thanks in part to a huge influx of Irish and Italian immigrants, two very Catholic ethnicities that absolutely horrified the genteel "real" Bostonians (all those kids - what ''must'' have they been up to?).
** A mangled variation in the Carolyn Mark song ''Honest Woman'' goes: "they want a whore in the kitchen, a wife in the bedroom, and a saint to live on in their minds."
** Roman satirist Martial wrote "If you enjoy being a prude so much, be one all day long. but at night, I want you to be my [[HighClassCallGirl high-priced hooker.]]"
* This was supposedly true for Messalina, Emperor Claudius's wife, who if Suetonius is to be believed, left the palace at night to work as a prostitute.
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