I really never had an ugly friend. I'm serious when I say that. And I've seen ugly people, but it has more to do with actions than looks.
Yes, I have many male friends that I've never, ever thought about in a sexual way. I just don't. I can't explain it.
I have a gay friend who is super attractive, and my husband has asked me more than a couple of times if he wasn't gay if I would be tempted by him. I always tell him that he's a friend, gay or straight I don't care. I asked if he was tempted by him and he clammed up! LOL! A little bi-curious maybe? He told me he finds him very attractive, but he's not into guys. I told him I found him very attractive too, but I'm not into friends.