I confess I don't get it. Being gay is one thing but being confused about your gender is just odd. You have a look between your legs and the mystery is solved. You don't have to be Hercule Poirot.
I don't get it either, however is that a prerequisite? The science is pretty conclusive that there are fundamental wiring differences in the brain between males and females – differences that form during gestation.
The processes that guide the construction and the wiring are fairly delicate and can be thrown off by a whole host of factors, from gene transpositions, deletions, transcription errors, alcohol, drugs, etc. Some people even claim that music can influence the process, which spawned a huge industry of people selling Mozart and Beethoven music to pregnant women.
So, is it not possible that through some fuckup during gestation a fetus develops a body that doesn't match the brain's wiring?
As I said, I don't get it – but I don't have to. I can imagine what it must be wake up with a body that doesn't match my "mental" blueprint. And I am convinced it wouldn't be a fun thing or something that could be solved by looking at what is between my legs.
You are over–simplifying and equating gender and sex.
