Well I guess it depends on your definition of roommates! You see someone people walking back together late at night
After the amount that I drink at these meetings, I see a ton of stuff in my room that isn't really there.
I once had a roommate that walked around naked the whole time. Also, he would spank it hard at night. When he would spank it, there was no hiding it. It was a cardio/grunt festival. I'll never forget that time I was walking to the bathroom and he had an ice pack on his junk. It seriously was the worst experience of my life!