I remember when I first started working at a hotel, and not even a month in, I heard guests in one room doing it. All I heard was the lady, and she was moaning so loud. The thing is, I had something to do in the room right next to theirs, so I heard it even louder.
Another time, an old couple were clearly about to do it, but I knocked on their door before they could even start. It took them a while to open the door, and when the old guy finally opened it, he was still only in his underwear, and I could see scattered clothing on the ground and bed.
