Rule 63

This article contains PROMOTIONS! Don't say we didn't warn you.

Rule 63 (also known as crossgender) is a meme among the "rules" of the Internet

"For any given male character, there is a female version of that character."

and, as a corollary, "For any female character, there exists a male version of that character."

Some people believe that androgynous characters are the exception -- these people are blissfully ignorant of the amount of Bridget fanart porn that exists. Jesus Christ. Due to a funny habit in the English language of using 'he' and 'him' as default pronouns, there's plenty of artwork of monsters and objects that have no determinate gender that are Rule-63'd into having human-female characteristics: tits, a narrow waist, or just long hair and wearing a dress, bashfully hiding her nucleus behind a not-yet dissolved fan.

Rule63 doesn't require that the opposite-gendered versions be in porn, though that's fine too.

Examples

Here are some:

• Female Space Marines
• Lolifex
• Lolicron
• Heavy-chan
• Warhammer 63k
• Lovedagger

Gallery

This is not a place to upload anything and everything Rule63 related; this is just for images already used on other articles. And try to keep this gallery worksafe.

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  tarrasque without her bikini top.
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  tarrasque
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  God-Empress of Mankind EXTRA HERESY!
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  God-Empress of Mankind MORE EXTRA HERESY!!! Goddammit, who keeps letting the Commissariat in here?
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  EVEN MORE EXTRA HERESY I can't resist anymore, it's just so good. *BLAM* HERESY Enough.
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  Cultist... and yet, he's still more feminine than you.
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  The reason for Angry Marine rage is 'cause they're still on the rag.
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  even your PCs aren't safe.
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  Stitches from Ruby Quest.
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  100% PRECIOUS.
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  Redd from Ruby Quest
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  Ace from Ruby Quest
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  Doomrider from 40k. But you can never know with Slaanesh.
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