History Main / SexMagic

** ''The Fog of War'' by Kitty Karnivore, a magical accident leaves Buffy and Spike stranded in a cold wasteland, and they have to reverse the spell through 'ritual' means. When Buffy has a look at the pictures attached, she immediately accuses Spike of having set up the whole thing on purpose.

* ''Literature/DianaTregarde'': In ''Jinx High'': The villain of the book can (and does) use other forms of magic, but seems to prefer sex magic when it comes to controlling people.

* Subverted in ''Anime/SpeedGrapher'', in which Kagura Tennozu has to be chaste and pure to develop Euphoria virus/powers as "[[SuperEmpowering The Goddess]]". During the time she's a captive of Suitengu and the Tennozu Group (before and after being rescued by Saiga), she's given chemical substances to delay her growth and postpone her first menstruation, which will result in the loss of her powers (presumably because once puberty happens she'll have sex).

* In Season 4 of ''Series/BuffyTheVampireSlayer'' used spellcasting as a [[GettingCrapPastTheRadar means of hinting at]] the [[HomoeroticSubtext lesbian relationship]] between Willow and Tara, leading up to a scene in "Who Are You?" where the two {{Hot Witch}}es invoke a spell called "[[IsThatWhatTheyAreCallingItNow the passage to the nether-realm]]". This involves them HoldingHands and getting all sweaty, breathing faster and deeper until they fall backward in ecstasy with a [[TheImmodestOrgasm giant flaming "O"]] rising around them. So perhaps not a literal interpretation of this trope, but the audience was certainly [[DoesThisRemindYouOfAnything expected to get that idea]].

* In Season 4 of ''Series/BuffyTheVampireSlayer'' used spellcasting as a [[GettingCrapPastTheRadar means of hinting at]] the [[HomoeroticSubtext lesbian relationship]] between Willow and Tara, leading up to a scene in "Who Are You?" where the two {{Hot Witch}}es invoke a spell called "[[IsThatWhatTheyAreCallingItNow the passage to the nether-realm]]". This involves them HoldingHands and getting all sweaty, breathing faster and deeper until they fall backward in ecstasy with a [[TheImmodestOrgasm giant flaming "O"]] rising around them.

* ''Series/Grimm'': Adalind casts a spell to strip Nick of his Grimm power that requires her to sleep with him in order to complete it. She uses a glamor to pretend to be Nick's fiancee, Juliette, so he'll willingly sleep with her. To reverse the spell, Juliette has to use a glamour spell to look like Adalind, [[{{Squick}} forcing Nick to willingly sleep with a lookalike of his rapist]], in order to get his powers back.

* ''Literature/WhateleyUniverse'': [[http://whateleyacademy.net/index.php/original-timeline/355-sun-and-fun Sun and Fun]] Abigail and Nimbus are "in the middle of a very complex working."

* In the Franchise/{{Nasuverse}}, bodily fluids can be used as a medium for {{Mana}} transfer, with sex being the most efficient method. This is often, but not always, [[PornWithPlot used as an excuse to add sex scenes]]. The [[BleachedUnderpants all-ages editions]] of these media tend to downplay this for obvious reasons.

** In ''VisualNovel/FateStayNight'', Shirou must have sex in order to transfer some of his Magic Circuits to Saber (in the ''Fate'' route) or to receive part of Rin's Magic Crest (in the ''Unlimited Blade Works'' route). Most other Masters don't need to do the sex, Shirou's just not so adept at giving energy. BleachedUnderpants adaptations replaced these with the infamously bizarre "mana dragon" and "mana dolphin" scenes respectively. In the True End of ''Heaven's Feel'' [[spoiler:Shirou's mind is placed in an artificial body which requires regular mana infusions from Sakura to sustain itself]].
** ''Manga/FateKaleidLinerPrismaIllya'' uses a {{Bowdlerised}} version of this PlayedForLaughs, with Kuro draining {{Mana}} from others through French kisses. When Illya asks if Kuro has any other means of transferring mana, we don't hear Kuro's response but it causes Illya to turn red.

* Inverted in ''ComicBook/{{Empowered}}''. Empowered and her boyfriend Thugboy are both very hot, and are constantly shagging. Their flatmate, the AmbiguouslyBi Ninjette, admits that she can use the sexual frustration created by their failure to have sex with her to boost her ninja magic.

* ''ComicBook/TheGreatPowerOfChninkel'': Volga the seer can only use her powers of foresight while having sex. This leads to a hilariously uncomfortable moment for [[TheChosen Jo'on]] since Volga is a giant blob of arms and stick eyes. However, [[AFormYouAreComfortableWith she alters both their forms to human first]].

* ''Literature/AClashOfKings'': It's implied that Melisandre creates a shadow assassin by sleeping with Stannis to absorb his LifeEnergy.
* ''Literature/HeraldsOfValdemar'': Falconsbane uses a mix of sex magic, nonconsensual [=BDSM=], and MindRape to brainwash Starblade. Undoing the damage requires a female Healer with IntimateHealing.

''Literature/WhateleyUniverse'': [[http://whateleyacademy.net/index.php/original-timeline/355-sun-and-fun Sun and Fun]] Abigail and Nimbus are "in the middle of a very complex working."

The Sex Mage World: "Sex Magic" in this universe uses energy created by men's lust to fuel spells cast by women. The spells, of course, being focused on controlling men's bodies and minds in various sexual ways. Making use of this power beyond just sex usually requires taking advantage of the weird side effects the interplay of energy and spells creates.

* The Temple of the Four Orders from''Film/SherlockHolmes2009'' apparently practices this [[spoiler:(or tries to: their "magic" is all mundane stage magic)]], as villain Lord Blackwood was "conceived during one of our rituals".

* It's implied in ''{{Film/Ghostbusters}}'' that this is how Lewis (the "key master") and Dana (the "gatekeeper") summon Gozer.
* ''Film/SherlockHolmes'': the Temple of the Four Orders apparently practices this [[spoiler:(or tries to: their "magic" is all mundane stage magic)]], as villain Lord Blackwood was "conceived during one of our rituals".

* ''ComicBook/{{Promethea}}'': One issue of notoriously consisted entirely of a sex magic ritual between the hero Sophie Bangs and her TricksterMentor Jack Faust.

* ''ComicBook/TheGreatPowerofChninkel'': Volga the seer can only use her powers of foresight while having sex. This leads to a hilariously uncomfortable moment for [[TheChosen Jo'on]] since Volga is a giant blob of arms and stick eyes. However, [[AFormYouAreComfortableWith she alters both their forms to human first]].

* ''TabletopGame/WarhammerFantasy''[=/=]''TabletopGame/Warhammer40K'': The Chaos god(dess) Slaanesh is the living embodiment of desire, so it has control over (and is fueled by) pain, pleasure and all manners of excess. [[note]] In [=40K=], it was actually created after the highly psychic Eldar engaged in millennia of hedonistic orgies to occupy their very long lives.[[/note]] While the sex aspect isn't used on the tabletop ([[Rule34 but fans are all too happy to make up for its absence]]), fluff contains a lot of references to pleasure cults that try to obtain hir favor or conduct rituals ([[Literature/CiaphasCain summoning daemons, for instance]]) this way.

* ''TabletopGame/WarhammerFantasy'' / ''TabletopGame/Warhammer40K'': The Chaos god(dess) Slaanesh is the living embodiment of desire, so it has control over (and is fueled by) pain, pleasure and all manners of excess. [[note]] In [=40K=], it was actually created after the highly psychic Eldar engaged in millennia of hedonistic orgies to occupy their very long lives.[[/note]] While the sex aspect isn't used on the tabletop ([[Rule34 but fans are all too happy to make up for its absence]]), fluff contains a lot of references to pleasure cults that try to obtain hir favor or conduct rituals ([[Literature/CiaphasCain summoning daemons, for instance]]) this way.

* ''Literature/GameOfThrones'': Melisandre creates a shadow assassin by sleeping with Stannis to absorb his LifeEnergy.

For this trope to be in effect, you have to have an actual spellcaster having actual sex for actual magical purposes. James Bond administering a SexFaceTurn to a minor female villain doesn't count, because he's not a mage, but a wizard using sex to set a mind-control spell on his partner would. While HornyDevils often drain magical/life energy from their partner(s), this trope doesn't kick in unless said horny devil is using the energy to ''do'' something. Normally those cases fall under VampiricDraining instead.

* ''The Folk of the Air'' by Peter S. Beagle: there is a fairly random sex scene between an ancient evil spirit in a boy's body and a young ([[{{Squick}} very young]]) woman for the purpose of "tantric sorcery."

'''Examples:'''

* ''Literature/TheDresdenFiles'':
** Magic is fueled by emotion, and this trope is one way to gather the necessary power. In ''Storm Front'', [[spoiler:Victor Sells prepares powerful death curses by holding orgies during thunderstorms.]]

* One of the fan-created supplements written under the Open Game Licence for the TabletopGame/D20System was the ''Book of Erotic Fantasy''. It contains extensive rules for all things sexual, including a number of spell-casting [[CharacterClassSystem classes]] who rely on sexual activity to use their magic, as well as a selection of spells unique to them that require having sex to cast.
* ''TabletopGame/WarhammerFantasy'' / ''TabletopGame/Warhammer40K'': The Chaos god(dess) Slaanesh is the living embodiment of desire, so it has control over (and is fueled by) pain, pleasure and all manners of excess. [[note]] In [=40K=], it was actually created after the highly psychic Eldar engaged in millenia of hedonistic orgies to occupy their very long lives.[[/note]] While the sex aspect isn't used on the tabletop ([[FreudWasRight not directly at least]], [[Rule34 but fans are all too happy to make up for its absence]]), fluff contains a lot of references to pleasure cults that try to obtain hir favor or conduct rituals ([[Literature/CiaphasCain summoning daemons, for instance]]) this way.

* ''Literature/DanteValentine'': Sexwitches in the generate Power to cast spells through sexual acts. Unsurprisingly most are employed as prostitutes or strippers and there was a major black-market trade in them before the passage of the

[[SuperRegistrationAct Parapsychic Act]].

* Various {{Hentai}} movies and [=OVAs=], some of them with fantastic or medieval settings, have this as their main plot.
* Subverted in ''Anime/SpeedGrapher'', in which Kagura Tennozu has to be chaste and pure to develop Euphoria virus/powers as "[[SuperEmpowering The Goddess]]". During the time she's a captive of Suitengu and the Tennozu Group (before and after being rescued by Saiga), she's given chemical substances to delay her growth and postpone her first menstruation, which will result in the loss of her powers (presumably because once puberty happens she'll have sex).
* ''Anime/QueensBlade'': Nyx can only use minor fire spells on her own. So, to power up, she allows her sentient staff (Funikura) [[CoitusEnsues to bang her.]] During which, it forces one of its tendrils in her mouth and makes her swallow several large mouthfuls of what appears to be semen. Which results in a near split-personality style transformation, as she changes [[ExtremeDoormat from doormat]] to [[TheDogBitesBack 'revenge mode'.]]

* Creator/PhilFoglio has used this a few times in ''[=XXXenophile=]'' stories with a fantasy setting. One story features a mystical order that routinely teaches apprentices how to summon extraplanar beings in order to have sex with them.
* One issue of ''ComicBook/{{Promethea}}'' notoriously consisted entirely of a sex magic ritual between the hero Sophie Bangs and her TricksterMentor Jack Faust.
* Among many other forms of magic, witches from ''Comicbook/TarotWitchOfTheBlackRose'' partake in sex magic. Especially appropriate, given the [[BestKnownForTheFanservice high count of naked women]].
* In the "Black Science" arc in ''Comicbook/TheInvisibles'', Lord Fanny is shown powering one of her spells with masturbation. ''The Invisibles'' also includes a rather unusual example in its ParaText: during its early run, the sales of the series dropped notably, and author Creator/GrantMorrison (who practices magic in real life) was worried it would get cancelled. To prevent this, he suggested a massive, multi-person [[ADateWithRosiePalms "wank-a-thon"]] on the letters page of one issue. The idea was that all the readers would masturbate on a particular date while focusing on a magical sigil Morrison had provided, and the resultant SexMagic would stop ''The Invisibles'' from getting cancelled. Unfortunately, this particular issue was delayed, so it came out only after the date Morrison had set, though the series was never cancelled anyway.
* Inverted in ''ComicBook/{{Empowered}}''. Empowered and her boyfriend Thugboy are both very hot, and are constantly shagging. Their flatmate, the AmbiguouslyBi Ninjette, admits that she can use the sexual frustration created by their failure to have sex with her to boost her ninja magic.

* Given the use of sexual imagery when Willow and Tara are spellcasting, as a GettingCrapPastTheRadar of hinting at their lesbian relationship, this naturally figures in ''Series/BuffyTheVampireSlayer'' SlashFic. And not just Willow/Tara either - in ''The Fog of War'' by Kitty Karnivore, a magical accident leaves Buffy and Spike stranded in a cold wasteland, and they have to reverse the spell through 'ritual' means. When Buffy has a look at the pictures attached, she immediately accuses Spike of having set up the whole thing on purpose.

* It's implied in ''{{Film/Ghostbusters}}'' that this is how Lewis (the "key master") and Dana (the "gatekeeper") summon Gozer.

* ''Literature/HeraldsOfValdemar'': Falconsbane uses a mix of sex magic, nonconsensual [=BDSM=], and MindRape to brainwash Starblade. Undoing the damage requires a female Healer with IntimateHealing.
* ''[[Literature/DianaTregarde Jinx High]]'': The villain of the book can (and does) use other forms of magic, but seems to prefer sex magic when it comes to controlling people.
* Sexwitches in the ''Literature/DanteValentine'' universe generate Power to cast spells through sexual acts. Unsurprisingly most are employed as prostitutes or strippers and there was a major black-market trade in them before the passage of the [[SuperRegistrationAct Parapsychic Act]].

* Prominent in Laurell K Hamilton's ''Literature/AnitaBlake'' and ''Literature/MerryGentry'' series, both of which feature a protagonist who can cast great works of magic through sexual acts. The only difference is, Anita Blake is part-succubus and Merry Gentry is half-fae.

* ''Literature/WildCards'': Fortunato's powers are based on, and charged by, Tantric sex.

** Magic is fueled by emotion, and this trope is one way to gather the necessary power. In ''Storm Front'', Victor Sells prepares powerful death curses by holding orgies during thunderstorms.