What does gender have to do with sexual orientation? The questions bigots ask again and again reveal their ignorance about the subject - and the fact that try as you may to explain it to them - even by referring them to expert sites on the matter, they just won't get it - shows contempt for diversity.
They continue to ask sarcastically "what makes gays physically different or is it a spiritual thing? Or is it a mental condition that convinces them that they are not men and women, but rather homosexual men and lesbian woman?" - So after all the long explanations - and even some really short ones - according to them a gay man is not a man? Gay people are "physically different"? LOL.
Here is the short version: