during my PhD my room was just underneath a shared 2-room dorm these two guys lived in
i had to sleep beneath their bedroom though, and the walls were super thin and i could hear EVERYTHING
one of them was like a machine, i used to lay awake in awe of this dude - constant rhythm, perfect sync, and I could tell he was hitting it deep for a good 30min nonstop
i fapped a couple of times. not in a gay way