[[quoteright:290:[[Franchise/StarWars http://static.tvtropes.org/pmwiki/pub/images/fem_trooper_7953.jpg]]]]
[-[[caption-width-right:290:There are [[BareYourMidriff many]] [[{{Stripperiffic}} reasons]] why [[SexyWhateverOutfit this uniform]] [[BatmanCanBreatheInSpace doesn't work]], and at least one reason why none of that matters.]]-]

->''The history of cinema is boys photographing girls.''
-->--'''Jean-Luc Godard'''

''The limit of the WillingSuspensionOfDisbelief for a given element is directly proportional to its sexiness.''

In other words, when things are sufficiently sexy, viewers will accept them, even when they are outright impossible, or just astronomically improbable.

A SisterTrope to SexSells.

Compare RuleOfFunny, RuleOfCool.
!!A SuperTrope to:
+ FanserviceCostumes
+ ImprobableAppearanceTropes
+ NudityTropes
+ PartialNudityTropes
+ RuleOfGlamorous
+ RuleOfRomantic
+ SexTropes
+ {{Unmentionables}}
%%Don't list a trope unless it explains why it's highly unlikely or outright impossible.
* BreastExpansion: In reality, breasts can't suddenly expand.
* ChainmailBikini: In reality, you should not fight in bikini-shaped armor, because it protects only some vital areas but not others.
* ClothingDamage: In reality, clothing does not degrade in a conveniently alluring fashion.
* CombatStilettos: In reality, you cannot run and fight in stiletto heels.
* CustomUniformOfSexy: In reality, each uniform is standard.
* DeusSexMachina: In reality, sex is not magical.
* ExposedToTheElements: In reality, clothing inappropriate to the elements can prove harmful or fatal.
* FormFittingWardrobe: In reality, a limit exists on how tight clothing can be (even when there is variance in material flexibility).
* {{Gainaxing}}: In reality, breasts do not bounce that much, ''especially'' if they're larger and '''heavier'''!
* GenderedOutfit: In reality, uniforms created for both genders consider practicality, rather than just showing as much skin as possible.
* GreenSkinnedSpaceBabe: In reality, were aliens to exist, we (most likely) could not have sex with them.
* HartmanHips: In reality, the human female body only forms a slight pear shape.
* HospitalHottie: In reality, hospital personnel dress for practicality.
* HotWind: In reality, wind does not appear just to make someone's hair and clothes move around seductively.
* ImpossibleHourglassFigure: In reality, the human female figure forms only a slight hourglass, even in the most ideal figures.
* IntimateHealing: In real life, sex or sensual actions do not heal serious injuries.
* LatexSpaceSuit: In reality, space suits are bulky to protect the wearer. And the closest experimental suits require the wearer to pack putty or fluid-filled sacs around anything that would otherwise stick out (like breasts and groins).
* MostCommonSuperpower: In reality, were superheroines and villainesses to exist, they would not all have large breasts.
* NaughtyNuns: In reality, nuns are more chaste than most people.
* NaughtyNurseOutfit: In reality, nurses dress for practicality.
* NaughtyTentacles - In reality, were tentacles to become sentient, no reason would exist for sex with humans.
* NonMammalMammaries: In reality, non-mammals don't have mammaries and even with mammals, they usually don't stick out like human breasts (not even primates).
* OrgasmicCombat: In reality, fighting does not sound like sex (and someone would have particular issues to get turned on by fighting in it).
* SheFu: In reality, such techniques are highly impractical in combat.
* SpyCatsuit: In reality, people cannot wear skintight clothing while remaining mobile and stealthy (barring flexible clothing material).
* {{Stripperiffic}}: In reality, people cannot carry out jobs while wearing clothing unsuitable for the application.
* SuggestiveCollision: In reality, when people collide, it's extremely unlikely that one person ends up pinned against the other person's sexy bits.
* WaifFu: In reality, slim women do not hit that hard.
* WorldOfBuxom: In reality, breasts come in various sizes, even small.
...but in fiction, we accept the alternative, because it's sexy.