1.1) Would you share your bed with a person of the same sex?
Well, my bed is a single, but I understand the point of the question.
If I'm in a situation that necessitates the sharing of a bed, I will not sleep, because it means that either I am at a friend's house, or they are at mine. I cannot sleep in such circumstances (Unless I have a reason for being tired already), due to severe trust problems. I have no qualms about being in the same bed as someone, though- it's no different to sitting next to them.
1.2) If no, what bothers you about it?
N/A
2) Can you openly talk about sex or sexuality?
Yes, but no one appreciates it, so I don't.
3) How do you act around up-tight people?
I try to correct their erroneous opinions. Yes, I am stating that not all opinions are equal, because they are not. I'd end that with an "That's just my opinion, OK?", to stop people arguing with me, but that would look foolish.
Remember, if I know that they are uptight, they are clearly in some way infringing on my rights to act the way I do, as I am not one to pry. I don't just stroll up to people and tell them to shape up.