Ya know, I've given little thought to this kind of stoopidness. However, since Bruce Jenner came out, declared himself "a girl" its been taking up a lot of news time and interwebz bandwidth. I feel that I must comment.
I have a simple test to prove if a "he" is a new "she". If they refuse to have their taliwacker and gonads surgically removed, then they are not serious about a change and remain a physical male. Plus there is the chromozone problem, as in no biological male can produce estrogen, with or without.
So, sorry Bruce. You can take the estrogen shot, grow bewbs, let your hair grow out and wear all of the dresses and gowns you want. But until you go full split tail, you're still only just another swinging dick. And the butt floss underwear is never gonna fit right.