This is semi-off topic, but I not only live with a girl, I am surrounded by girls in my apartment. The people next door and the people above me are all girls. The girl directly above my bedroom has had sex at least three times since I've been there -- I think with different guys because the speed and voices have changed a bit. My walls are tight, I can't hear my roommate at all when she does, but the upstairs people sound like they're in my room lol. Last night the chick above me had a screaming o, it woke me up lol. I was a little miffed because I've never heard them on Saturday or Friday, although I am out pretty late, but I've heard them consistently throughout the work week. I'd love to pull a Forgetting Sarah Marshall on them, though that would take some luck. If not that I need to find a way to mess with them next time -- like tape a speaker to the ceiling or something...have to think of something clever.
(The girls upstairs are not particularly hot before anyone starts getting excited).