So now that we're dropped in this lovely school with nothing better to do than fuck each other (free condoms!) I think it'd be mad useful to know the following.
Who's a virgin? Who's up for it? Who's gay? Who has diseases, and finally, who's much too creepy to bother looking at?
Full disclosure saves trouble later. If your roommate/friend's too shy to divulge, feel free to do that for them.