'''Basic Trope''': For whatever reason(s) (MoralGuardians, religious morals, the age of the characters, etc.) sex is considered an act that crosses the MoralEventHorizon.
* '''Straight''': AliceAndBob have sex. Alice gets pregnant, and both come down with terrible, incurable [=STDs=].
* '''Exaggerated''':
** DeathBySex.
** By merely flirting with Bob, Alice is dragged to hell by demons, some of whom are even [[EvenEvilHasStandards crying at what took place]].
* '''Downplayed''': AliceAndBob have sex, and they both come down with an unpleasant, incurable case of herpes.
* '''Justified''':
** Alice and Bob are teenagers, and CantGetAwayWithNuthin for the sake of a VerySpecialEpisode.
** Sex, especially of the premarital and/or non-reproductive variety, is [[AgainstMyReligion against Alice and Bob's religious beliefs or social mores.]]
** AliceAndBob live in a society before germ theory and modern medicine: people don't understand the ''exact'' cause of STDs, but they know that it has something to do with sex, and therefore figure that sex (or certain kinds of sex) angers the PowersThatBe.
** AliceAndBob live in an era where STIs are next to impossible to treat: bacterial infections (such as chlamydia and syphilis) have become resistant to all known antibiotics, and viral infections (HPV, HIV, herpes) have likewise evolved resistance to all known antiviral drugs. It's just too risky to be promiscuous, even with condoms.
** AliceAndBob live in an era where reliable birth control either does not exist or is difficult to obtain, and where lineage and inheritance are SeriousBusiness: sex carries too much risk of unplanned or unwanted pregnancy to be treated flippantly.
* '''Inverted''': SexIsGood
* '''Subverted''':
** Alice and Bob have sex after discussing how nervous they are about something bad happening to them for it. Nothing bad happens.
** This only applies to non-marital and/or non-reproductive sex in this setting.
** Sex isn't ''evil'' so much as it is ''powerful''. It's too great a source of pleasure and creativity to classify as evil, but too dangerous and unpredictable to classify as good either. (See also OrderVersusChaos)
** This only applies to situations of [[SexualHarassmentAndRapeTropes rape]] or QuestionableConsent, [[PedoHunt especially if a minor is involved]]. Sexual acts, flirtation, etc. between consenting adults are fine.
* '''Double Subverted''':
** At least not right away. The [[ButWeUsedACondom pregnancy and STDs]] may show up later, emotional hang-ups and the accompanying drama ensue later, and [[MyGirlIsNotASlut people scorn Alice for her part when they find out.]]
** It turns out AliceAndBob were not married to each other (whether or not they were to other people), and not doing it for the purpose of having a baby. Thus they experience consequences, while a married couple actively trying to conceive do not.
** UsefulNotes/VictimBlaming is rampant, and people are more likely to say that someone who was raped "got what s/he deserved."
* '''Parodied''': Alice and Bob spontaneously combust for even so much as ''thinking'' [[CovertPervert naughty thoughts]], and explode if they dare to act on them.
* '''Zig Zagged''': [[RealLife Some couples have problems and drama related to sex, others have sex with no problems or drama.]]
* '''Averted''':
** No one has troubles related to their sex lives.
** SexIsGood
* '''Enforced''':
** Alice and Bob are characters in a pamphlet or video meant to be shown in Sunday School.
** Alice and Bob are characters in a TeenDrama, and the episode is a VerySpecialEpisode [[{{Anvilicious}} meant to]] ScareEmStraight
** The movie Alice and Bob were in was made during the days of UsefulNotes/TheHaysCode.
* '''Lampshaded''': [[Film/MeanGirls "If you have sex, you WILL get chlamydia. And die."]]
* '''Invoked''':
** A minister or Sunday School teacher brings it up in his[=/=]her sermon.
** An abstinence-only sex-ed class
* '''Exploited''': Bob is an idealistic hero, but not above sexual urges. Claire is a CardCarryingVillain and seduces him with her feminine wiles because having premarital sex will bring him over to TheDarkSide.
* '''Defied''': Alice and Bob join a religion (yes, there are a few) that believes that SexIsGood, or at least not evil.
* '''Discussed''': "What's so bad about sex anyway?"
* '''Conversed''': "While it's true that there exists the possibility of things going wrong, if you have sex responsibly (use condoms, get tested regularly, and limit the number of partners you have), they're less likely to. It's just people are afraid of things going wrong, and that fear for their safety and their partner's safety translates as a [[SexIsEvil fear of sex and sexuality.]]
* '''Deconstructed''':
** Sex is treated as a MoralEventHorizon crossover because there really does exist the possibility of [[DisasterDominoes things going wrong.]] Because of that, MoralGuardians and the like see it as evil, not because it *is* evil, but because they're afraid of the possible consequences. The LaserGuidedKarma killing off all the amorous couples in the series is a reflection of these fears.
** Alternatively, a MadScientist sees SexIsEvil, and finds [[BodyHorror means]] [[CyberneticsEatYourSoul of]] [[BrainInAJar destroying]] [[PlayingGod sexuality]] by declaring that the human body is a disgusting immoral thing that should be destroyed and replaced with machinery that does not desire or have sex, resulting in [[UnwillingRoboticisation dehumanisation]].
** The MoralGuardians end up running society and proceed to [[NoSexAllowed outlaw sex]], punishing offenders with death.
** PoliticalCorrectnessGoneMad runs society, and while sex itself is not outlawed, sexual ''desire'' is, having been decreed to be inherently degrading and objectifying. It is considered impossible (at least by the MoralGuardians in charge) to be sexually attracted to someone and still view and respect them as a human being rather than reducing them to their body and appearance. Thus, all citizens are chemically castrated to remove sex drive, and people only have sex for reproductive purposes.
* '''Reconstructed''': Alice and Bob become more informed about sex and how to protect themselves. They strengthen and stabilize their relationship. (And of course they strive to be [[GoodPeopleHaveGoodSex good people.)]] Because they don't fear harm coming to themselves or their partner, sex is not seen as an evil act. [[SexIsGood It's good and beautiful.]] Or, at worst, as neutral as eating a PB&J sandwich.
* '''Played For Laughs''': LaserGuidedKarma for sleeping with AnythingThatMoves.
* '''Played For Drama''': SexIsEvilAndIAmHorny.
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%% Optional items, added after Conversed, at your discretion:
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%%* '''Implied''': ???
%%* '''Plotted A Good Waste''': ???