I can guess by your tone that you are from a cultural tradition of puritanism, sexual repression, and general scapegoatery. This makes the most likely guesses as european, or perhaps middle eastern, third guess chinese. However your attitude tells me absolute zero about your melanin content. For that, the best I can guess is the average of the members of those large cultural groups.
Well, I can't speak for his melanin content, but he has made some comments which either imply, or outright state, that he is of white, Indo-European stock. He may have tanned, which would increase his melanin content.
Of course, while I can tell precisely from his comments his gender, general skin tone, sexual orientation (with high probability - he
might be acting this way out of fear that he himself is gay), and cultural background, He can tell very little of ours, especially gender and ethnicity. He may, in fact, be speaking with a group of African tribesmen who inexplicably have better English than he does, and he'd never know it. I'm sure this infuriates him.