I'm understanding the terminology and stuff, but not the idea. I don't know if that makes sense. I thought it was pretty clear cut..Male, Female, Male that feels they are female, female that feels they are male. I thought anything else fell into sexual attraction categories like Straight, Bi, Gay, Lesbian, and A-sexual. When did this start being known, and are there statistics on percentages of people who are each thing? This next question is NOT meant to insult or be rude. Are these different things similar to mental disorders? And just to clarify, pangender is the same thing as bi? I understand there are things you should not ask, this is completely out of ignorance and wanting to understand. My last question, and I hope non of this offends anybody, is why those with gender issues dress not as their sex?