[[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 degree of 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 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 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.
* 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.