Rule 76
There is always a shemale version of a female character, NO exceptions.

This is a rule I have identified and proven through many hours of intensive research of the internet and based off the existing rule 75.
Dude1:  OMG, is that a shemale batgirl screwing a shemale supergirl?…  Shit, it is, Rule 76 ROXZ my SOXZ!!!!!!!!!!!