In college we used bunk beds, i was on the bottom (so the fat kid didn't have to climb to the top while drunk, not only is your balance bad, but gravity pulls at the big kids ass more
) and I know several times i've had sex when my roomie was (i persume) sleeping above me.
of course, I believe that he had sex when i was below him.
Of course, when we wanted to have a private evening alone we communicated. The classic line of "hey, how about you don't come home this evening" worked pretty well for us.
one day, after not coming home last night because he asked, I asked him how it was and he said
"Fuck dood, you should have been here so we could have played video games or something. She got drunk and I spent most of the evening holding her hair back"
heh
I miss college, the roomies, the atmosphere, the sense of community and comraderie.
now people that live next to you are assholes and you can't really grab a six pack and head two houses down for a party (in most circumstances....)