Cordelia: I learned something, too. I learned, um… men are evil? Oh wait, I knew that. I learned that L.A. is full of self-serving phonies. —No, had that one down, too. Uhh… sex is bad?
Angel: We all knew that.In many moral codes, sex is regarded as fraught and dangerous. Moral Guardians and their comrades have always considered sex more disgusting in multiple magnitudes than violence; the inherent lack of logic in this (excluding things like rape and paedophilia, for obvious reasons, sexuality is much less harmful to the human pysche than violent acts) always seeming to evade them. The Hays Code, in particular, outlawed anything that even remotely implied sex, whereas hangings and executions could be shown "within good taste". (It should be noted, however, than sex and violence absolutely can go [[Interplay of Sex and Violence together.) So, of course, adding sex automatically makes works Darker and Edgier. Want to add menace to your villain? Have him make sinister advances towards the heroine, or the hero. Want to hammer into people's heads that this villain is irredeemable? Have him rape someone. Want The Ingenue to make a Face–Heel Turn? Get her laid. Bonus points if said villain is Ambiguously Gay. In older works, Sex Is Evil could also be used as a free pass for the hero to be a total jerk under the banner of Sex Is Evil and I Am Horny. For example, he could sexually abuse women (including way too young ones), and then show his goodness by forgiving them for tempting him. There is a bit of justification for this, however. After all, while sexual pleasure is an integral part of human biology, it can be dangerous to one's health if done without protection (e.g. AIDS and unwanted children), and sex is just one of countless number of things that it's easy to get impulsive and addicted to. And if you're sleeping with someone you really should not be sleeping with, you can get in all kinds of trouble, marital, legal or otherwise. Of course, Moral Guardians being Moral Guardians, they're simply going to take this concept too far to the point of irrationality and portray sex as the most terrifying and nauseating Eldritch Abomination in all of existence, with only exterminatus as the solution. Contrast with Sex Is Good and Good People Have Good Sex. Tropes that are influenced by this include:
- Beauty Is Bad
- Bondage Is Bad
- Bury Your Gays
- The Cheerleader
- Contractual Purity
- D-Cup Distress
- Death by Sex
- Defiled Forever
- Evil Is Sexy
- Horny Devils
- Hot Guys Are Bastards
- I Have You Now, My Pretty
- Madonna–Whore Complex
- My Girl Is Not a Slut
- Nature Adores a Virgin
- No Sex Allowed
- Sensible Heroes, Skimpy Villains
- Sex Is Evil and I Am Horny
- Virgin Power
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Anime and Manga
- Full Metal Panic!. Sousuke is a Chaste Hero who is obviously a virgin and doesn't understand anything about sex. And then to contrast, there are the villains from Amalgam who have a huge array of weird kinks and depraved tendencies. Gauron, a sadomasochistic, Depraved Bisexual pedophile and necrophiliac who displays most of these kinks towards Sousuke. Gates, Ax-Crazy Lolicon rapist who masturbates to animal nature videos (and is very likely a necrophiliac as well, though not as explicitly stated). And the Twincestuous Creepy Twins Xia Yu Fan and Xia Yu Lan, who most likely had something going on with Gauron and are shown to be rather promiscuous (with them seducing the AS repairmen in Amalgam). Even the villainous female scientist who only had a small part in the beginning has depraved kinks. In the novels, she's shown to enjoy Gauron strangling her as much as he does. He even lampshades it by mocking her with amusement. To go further, even Leonard is not exempt from this—in the novels, when he's first mentioned, he's shown to be a rather loose playboy that sleeps around. Over the phone, he's heard to have had sex with a woman with a high nasal voice.
- Neon Genesis Evangelion, with its focus on adolescence and pathology, broadly hints at this trope more than once. In particular, the Mind Screw collage in End of Evangelion includes a shot of Shinji screaming while the word "SEX" flashes across his face.
- It's difficult to tell whether Speed Grapher is anti-sex or just anti-fetish, but it's definitely anti-something. How healthy a relationship is tends to be inversely proportional to how sexual it is, and all but one sexual fetish in the series either requires killing or mutilating people, or leads to killing or mutilating people (sometimes for no apparent reason, as when the tattoo fetishist kills the girl he's dating.)
- Damn near every sex-related scene in Berserk, consensual or not, is used to gross the hell out of the audience. Never mind all of the rape that goes on (and how the product of said rape can produce evil itself), but you have Slan, who is a Gorgeous Gorgon with BDSM tendencies and leanings, you have Wyald, who doesn't have the decency to hold off on having sex with dozens of women in the middle of a conversation, then you have the pagan worshipers and their disgusting psychedelic orgies, and the numerous, numerous phallic and vaginal imagery in various monster designs…
- Not to mention that sex was linked to Griffith's downfall when he has sex with Princess Charlotte after Guts departed from the Hawks. The scene was not particularly romantic…
- Need we remind of Femto's infamous rape scene of Casca which is played out as THE epically gruesome point in a scene where all of her comrades' deaths are, while still portrayed horribly, still far from emphasized to that extent. Also, the rape causes her to promptly Go Mad from the Revelation afterwards, transforming her mind into that of an infant.
- Averted thus far twice: Guts and Casca's first time is portrayed as the only bright spot in their lives up to that point (and that's with Guts almost strangling Casca due to rape flashbacks), and most of the prostitutes in the refugee camp during the Tower Arc are shown in a positive light (save for Nina, who is classed under the pagan worshipers mentioned above). One of the lesser themes is that sex, while not inherently bad, is far too easy to turn to bad ends.
- Paulie from One Piece fullfills this trope.
- Star Driver is big on this trope too. On the one hand, you get the Chaste Hero main character Takuto, who borders on having a Paralyzing Fear of Sexuality while on the other hand, there is his father Big Bad Head, a Depraved Bisexual who will sleep with everyone he comes across in order to manipulate them into doing what he wants. Of course, everything in this series runs on "libido" (in the literal and metaphorical sense), so you do also get sexually active and inactive characters of every alignment, but the contrast between the main character and the villain in this regard (and a few more things) is so heavy that it just screams this trope.
- The women in America 3000 seem to have this idea about sex with men, which is rather problematic since they still need the men to make babies. As Tiara Vena's best friend Lynka puts it, "It's a cold act… but it's gotta be done." The men also seem to have developed the same contempt for women, at least until Korvis and Vena work out their natural attraction to each other and then find a way to change all their followers' minds as well.
- Played straight in The Wicker Man (the original, not the newer version), in that the straight-laced Christian officer is shocked at the depraved sex and immorality surrounding him on the island, believing that they were evil heathens—and he was proven right.
- In some cruel irony, his chastity was part of the reason why Lord Summerisle chose him to be sacrificed. If he hadn't resisted Willow's seductions earlier in the film, he might have escaped his fate.
- Zardoz: THE PENIS IS EVIL!!!
- In Dracula, being bitten is interpreted as a metaphor for sex (although Van Helsing himself actually laughs at seeing donating blood as a metaphor for sex). When Dracula bites the unconscious Lucy and forces Mina to drink his blood (both against their will), it's evil. When Lucy's fiancé, 2 admirers, and Van Helsing give her blood, it's redemptive. Jonathan and Mina are married and sleeping together, which is not portrayed as evil any more than Lucy's excitement at becoming engaged to Arthur. In this context, rape is evil, but mutual, passionate love is portrayed as necessary, healthy, and beautiful, which is quite an impressive distinction for a Victorian novel to make.
- It might surprise some people, but this trope is averted in The Bible. Sex is to be used within marriage, and there are whole chapters devoted to it, e.g., not going with "strange women" (harlots), with reasons given, but there's also a whole book (The Song of Songs aka The Song of Solomon) devoted to sex and romance ("her breasts shall satisfy thee always"), and there's even bits in the New Testament about not "depriving" your mate of sex, except by mutual agreement for a short time.
- The Party in Nineteen Eighty-Four preaches that sex is like a minor and disgusting operation, all as part of an attempt to corrupt the sex drive.
- Keira in "Scourge the Heretic" is a psychotic zealot assassin raised in a Sex Is Evil Redemptionist society that believes killing sinners is righteous and everyone has done something. Unfortunately for her faith, she is also a teenage girl. Hilarity Ensues.
- In Atlas Shrugged, former movie actress Kay Ludlow complains about this trope applying to her roles:
"Whatever quality of human greatness I have the talent to portray—that was the quality the outer world sought to degrade. They let me play nothing but symbols of depravity, nothing but harlots, dissipation-chasers and home-wreckers, always to be beaten at the end by the little girl next door, personifying the virtue of mediocrity."
- Asher in Someone Else's War doesn't even want to see it suggested that people are having sex.
"Get that filth out of here!"
Live Action TV
- One of the more frequent knocks on CSI is that this is pretty much how any sex practices outside of the norm come off.
- One significant exception is Lady Heather, a dominatrix who is consistently portrayed as a mentally balanced and sympathetic character. She even develops a friendship and possibly has a brief romantic relationship with Grissom. Later she nearly kills the man who murdered her daughter, but this is not really related to her sexuality.
- This would seem to be the 'moral' being raised in American Gothic, unsurprising for a show where the Big Bad is essentially Satan, known for using lust as his primary weapon. Not only does Selena spread her legs at the drop of a hat for Buck (or to corrupt Ben, or Dr. Peele, or…), but Buck himself seduces Gail into a cringing Damsel in Distress, it was his rape of Mrs. Temple that started everything, and even Merlyn's desire for a normal life (complete with a love interest) almost costs an innocent baby its life and leads her to suicide and a return as an avenging angel. Oh, and when Buck corrupts the wife of a hospital orderly with a magic mirror, what's the first thing she does? Turn on the seductive charm.
- Joss Whedon did this so much in the early seasons of Buffy the Vampire Slayer, in the fourth season he made an episode that was all about subverting it: "Where the Wild Things Are" was dedicated to exploring a haunted house that punished people for sexual activity.
- What's weird is that he expressly says in interviews and the DVD commentaries that he created the character Buffy to subvert this (well, the trope of the blonde girl always being killed off in horror films, but he considers the death = punishment for having sex is a part of that trope).
- Angel frequently had this trope, to the point in one episode in the first season Cordelia was searching for a lesson to learn from the experience and eventually settled on "sex is bad", one which Angel immediately agreed with.
- Margaret Cho fell victim to this trope while filming her sitcom All-American Girl. The series was based on her life, and Cho wrote in her autobiography how the producers would make her character refuse any and all sexual advances, even situations where she herself would have consented.
- House had a lot of episodes, especially in the first two seasons where the Disease of the Week was tied in some way to sex, often outside of marriage (affair, unmarried couple, etc), or thought to be at some point in the episode. This culminated in a second season episode called, naturally enough, Sex Kills.
- This seemed to be part of the general theme of Robin Hood. There are only two people that definitely had sex on the show: Guy of Gisborne with a serving maid, and one half of an Abel And Cain pair of brothers (naturally, the evil one). But apart from that, both Robin and Marian were portrayed as being sexually attracted to the Gisborne siblings: Guy and Isabella. They are both punished severely for their "lust".
- Marian is eventually murdered by Guy in death scene that is deliberately filled with sexual symbolism, and which creator Dominic Mingella calls "the consummation of Guy and Marian." After Marian's death, Robin finds himself in a Love Triangle with Isabella and Kate, who embody the Madonna/Whore stereotype. Isabella sucks on strawberries, carries money in her garter, wears seductive red dresses, and has escaped an abusive marriage. Kate is a peasant virgin with a crush on Robin who instinctively distrusts Isabella. Naturally, Isabella turns out to be evil, revealed after she tries and fails to lure Robin away from his calling as a hero to the people. She eventually murders him. Lesson: if you're sexually attracted to someone, they will kill you.
- Vaal forbade love and sex to his primitive subjects in "The Apple" episode on T.O.S..
- In the "Hook Man" (S01, Ep07) episode of Supernatural, Lori's date, who gets a little fresh, and her roommate, who was promiscuous, are killed by the titular Hook Man.
- Characters’ tendency to link sex and sin is a running theme of Night and Day, but as an in-universe phenomenon, it's frequently played for laughs. It’s most overtly exemplified by Frankie, who is in denial about sex to the degree that she founds a Virgin Army, dedicated to excising racy passages from Victorian novels. Other characters frequently display hang-ups about sex and morality – not least Rachel, Kate, Ryan, Mike, Natalie and Sam. That said, the show also features plenty of not-for-laughs references to the dark side of sexuality, for example including Parental Incest as a central plot point.
- In Warhammer 40,000, sexual activity of any sort feeds the Chaos god Slaanesh, (though excess of anything will as well) which is the Cosmic Horror manifestation of desire, lust, and similar emotions. Eldar have to be very cautious during reproduction, or Slaanesh is liable to rip their souls from their bodies…
- Baldur's Gate II allows you to romance party members. Sex with them has an even split on negative consequences. The final dialogue for Jaheira's takes place between you and her the morning after, and the only one where coupling appears before the end of the relationship at all is with Viconia, an evil character. Meanwhile, if you sleep with Aerie, it breaks the romance. The expansion allows (literally) Good People to Have Good Sex, plus you can convert Viconia from The Dark Side and impregnate Aerie.
- Surprisingly, this seems to be the moral of Sexy Losers, though it's a bit more complex than most instances of this trope. The characters who engage in sex aren't (usually) evil at heart, but as they become obsessed with getting more and more sex, they become less and less interested in who they're having sex with, treating others only as tools (or more accurately, blow-up dolls.) In one case, it's been openly stated that a character will die alone and unloved unless he can learn how to actually love people and not just lust after them.
- Bittersweet Candy Bowl features a sex ed teacher who thinks this way. Her (middle school) class all agrees that she needs to get laid.
- In Sinfest, this was subtly implied before becoming downright blasted with the Sisterhood and the Devil with his succubi. It's telling the only couple, the redeemed devil girl Fuschia and pillar of viture Criminy are chaste (though it's implied Fuschia teases Criminy).
- This meets Fetish Fuel in some stories on The Erotic Mind Control Story Archive, with a rather populous sub-genre of stories where the sexual act is the method of a corrupting, controlling force. Also found if you poke around its host/ sister site asstr.org (NSFW) in the stories of Stephen Gray and others. The application of the trope in the stories ranges from cheesy bordering on parody (intentional or not) to downright Nightmare Fuel—which may be just your thing.
- Deconstructed here
- Kakos Industries treats sex as a commodity the Good people of the world abandoned and can't have back. The members of the cooperation are more than happy to exploit their incredibly aggressive sex drives, almost always looking for new ways to get themselves off with whoever they want, whenever they want.
- The South Park episode "Good Times with Weapons" left Butters with a shuriken stuck in his eye, but none of the adults (except arguably Butters' parents) cared they were more concerned with Cartman's naked walk across the stage at an auction that most of the town was watching. Stan hit the nail on the head: "Parents don't give a crap about violence when there's sex stuff to worry about."
- Family Guy: "If you have sex, you're automatically in Al Qaeda."
- Three of the Lost Commandments on Moral Orel:
- Number 11: Thou shalt be ashamed of thy natural anatomy.
- Number 12: Thou shalt only have sex face-to-face, man on top.
- Number 19: Thou shalt not masturbate.