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Rule of Sexy

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There are many reasons why this uniform doesn't work, and at least two reasons why none of that matters.

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

The limit of the Willing Suspension of Disbelief 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 Sister Trope to Sex Sells.

Compare Rule of Funny, Rule of Cool.

A Super-Trope to:

  • Bandage Babe: In reality, having enough bandages to sufficiently cover areas such as the chest means that rest is a good idea, especially if serious wounds haven't fully healed, and wearing little else can expose the rest of the body to extreme weather and further injury.
  • Breast Expansion: In reality, breasts can't suddenly expand.
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  • Censor Steam: In reality, steam is sometimes transparent, and can't be trusted in covering body parts when it isn't.
  • Chainmail Bikini: In reality, you should not fight in bikini-shaped armor, because it protects only some vital areas but not others.
  • Clothing Damage: In reality, clothing does not degrade in a conveniently alluring fashion.
  • Combat Stilettos: In reality, you cannot run and fight in stiletto heels.
  • Custom Uniform of Sexy: In reality, each uniform is standard.
  • Deus Sex Machina: In reality, sex isn't something that you need to do to make something rather than human reproduction work.
  • Exposed to the Elements: In reality, clothing inappropriate to the elements can prove harmful or fatal.
  • Form-Fitting Wardrobe: In reality, a limit exists on how tight clothing can be (even when there is variance in material flexibility).
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  • Fur Bikini: In reality, you can't keep warm in a bikini made of fur, as it exposes too much of the body.
  • Gainaxing: In reality, breasts do not bounce that much, especially if they're larger and heavier!
  • Gendered Outfit: In reality, uniforms created for both genders consider practicality, rather than just showing as much skin as possible.
  • Godiva Hair: In reality, hair cannot be trusted with covering body parts.
  • Green-Skinned Space Babe: In reality, were aliens to exist, we (most likely) could not have sex with them.
  • Hartman Hips: In reality, the human female body only forms a slight pear shape.
  • Hospital Hottie: In reality, hospital personnel dress for practicality.
  • Hot Wind: In reality, wind does not appear just to make someone's hair and clothes move around seductively.
  • Impossible Hourglass Figure: In reality, the human female figure forms only a slight hourglass, even in the most ideal figures.
  • Intimate Healing: In real life, sex or sensual actions do not heal serious injuries.
  • Latex Space Suit: 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).
  • Most Common Superpower: In reality, were superheroines and villainesses to exist, they would not all have large breasts.
  • Naughty Nuns: In reality, nuns are more chaste than most people.
  • Naughty Nurse Outfit: In reality, nurses dress for practicality.
  • Naughty Tentacles - In reality, were tentacles to become sentient, no reason would exist for sex with humans.
  • Non-Mammal Mammaries: In reality, non-mammals don't have mammaries and even with mammals, they usually don't stick out like human breasts (not even primates).
  • Orgasmic Combat: In reality, fighting does not sound like sex (and someone would have particular issues to get turned on by fighting in it).
  • Panty Fighter: In reality, women on martial arts don't need to wear something that almost always reveals her panties.
  • Sex Magic: In reality, sex doesn't give you powers.
  • She-Fu: In reality, such techniques are highly impractical in combat.
  • Spy Catsuit: 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.
  • Suggestive Collision: In reality, when people collide, it's extremely unlikely that one person ends up pinned against the other person's sexy bits.
  • Waif-Fu: In reality, slim women do not hit that hard.
  • World of Buxom: In reality, breasts come in various sizes, even small.

...but in fiction, we accept the alternative, because it's sexy.

Example of: