I have a story to contribute: I was hit on once way back in college. This guy, who was black and weighed about 250 pounds invited me to a gay & lesbian film festival. I declined, saying that didn't interest me. Then he wanted to know if I had a girlfriend, and at the time I didn't, therefore he thought it was open season!
Apparently he thought homosexuality was like religion, and could "convert" people if he could present it logically. He tried explaining that if the room is dark, and you can't tell if a girl or guy is blowing you, then it doesn't make a difference. He was somewhat aggressive in pushing the fact that it shouldn't be knocked if it hasn't been tried.
Not being swayed by his sense of logic, I remained loyal to being heterosexual. He finally ended the conversation by asking if I wanted to know if he found me attractive. I declined once more, because:
1- If he said I was attractive, I'd feel even more creeped out.
2- On the flip side, if he said I wasn't his type, then I'd feel insulted at having been rejected by the
other 50% of the population.
The shame of it is that he was a decent fellow, really. As soon as the conversation went THAT way, though, it made me glad I wasn't in prison.