There is an opposite race?
Strictly within the context of the conversation, only two were mentioned, so yes.
Err, no. I see people talking about black skin and light skin in the conversation. That's skin colour, not race. You do know that there's more than one race with black skin, don't you? Just like there's more than one race with light skin.
there has literally never, ever been a single case of a man raping a woman who dressed as woman
I admit that I can't cite a real life case, but I distinctly remember a Criminal Minds episode where this does happen. Sure, it's fiction, but I suppose if someone can think of a plausible scenario where this sort of thing can happen, is it such a big leap to think that it can happen in real life?
Living on Earth may be expensive, but it includes an annual free trip around the Sun.