1. I'd make sure I couldn't do anything with the situation, because I'd be annoyed if I had to share a bed and then found out that there was one, say, of those fold-up beds in the cupboard I could have used. If not then, yeah, I guess so.
2. -
3. I feel if someone asked me, I would be okay with discussing it. But, generally, my friends and I don't talk about that. We don't even swear, 'cus our conversations are usually a bit too cerebral (or goofy/childish) to swear without making it sound like we're swearing because we're 'grown-ups'.
4. Depends how stuck-up. If you're talking "so stuck up they're repulsed by the very notion that someone, somehwere at some point in history MIGHT have POSSIBLY THOUGHT about having sex" then I'd leave, because I'd have accidently walked into a Presbyterian church. ZING