We don't want young girls being exposed to men's plumbing .  It's a recipe for disaster . Put another way---anyone who refuses to accept the way they are born has issues---and clearly can't be trusted around our kids.  Putting our kids at risk because supporters of this nonsense say these misguided people won't hurt anyone is too big of a risk.   As to the one in a million situation where people are born with both--go with what the doc said you were on the birth certificate .  You are right---bathrooms are used to eliminate bodily waste---not to show off that you can't accept the way you were born .