Have you ever heard a couple having sex?

One night a few weeks ago I was heading to bed. I'd just gotten myself off like I usually do, watching some nice videos on my computer. I put my computer in sleep mode, but then a few minutes later I started hearing these noises. First, it sounded like someone was being whipped, then I heard a woman screaming over and over. She said "Oh oh" followed by "Yes Yes." I kept checking my computer to see if those sounds were coming from it. Maybe my computer was still playing videos. But no, it was definitely people having some fun. Part of me wanted to tell them to be quiet. Another part of me was wondering exactly where the noise was coming from. I live in an apartment, and I was wondering if it was the apartment next to mine, or maybe one I could see through my window. Yet another part of me really just wanted to know who was getting it on, and if they wanted some company :)