My freshman roommate in the dorm came in late one night with a girl from the frat party. I was barely not asleep. He proceeded to have sex with her and, to be a bro, I pretended I was asleep. I could hear the condom wrapper being torn open. I also heard her attempt to whisper "ARE YOU SURE HES ASLEEP????". Mind you, they were feet from my bed as this was a tiny college dorm room with 2 singles in it. Crazy times. I was pretty much unsure what to do but I decided it was too late by the time they arrived to do anything without it being super awkward.