>It seems odd, but you can definitely use mathematical equations to solve the pubic hair or no public hair dilemma. Only women who've gone through puberty have pubes. Pubic hair is a sign of physical maturity. Hence:

Hairy crotch = woman = (ostensibly) fuckable
Bald crotch = girl = too young to fuck

This important equation has served humanity well over time. I'm not saying that just because someone has pubic hair that they are at an appropriate age for sex. But I am saying you can be very sure that if a girl doesn't have pubic hair at all yet, fucking her can lead to prison time. Say hi to your new cellmate and bend over.

A woman without pubic hair probably seems a lot less sexy now, huh?