gender identification

The University of Ca. now has six categories to determine gender identity.
You see in the good old days little kids would pull down their pants and look.
If there was a pee pee it was a boy and if there wasn't it was a girl.
I guess it is human nature to try to manipulate and control nature.
That is why human's build nuclear power plants on fault lines and build
houses in flood zones.
It usually doesn't end well. Just saying.