I had the front seat/back seat experience with my high school girlfriend. We were in the front seat, double dating with a couple in the back. We parked for a makeout session, and we both got our gf's shirts and bras off pretty quick. After making out for a little while, I noticed that the couple in the back had slid down in the seat. Soon I heard him fucking her. I looked back and could see some of the action too. Such a turnon. I tried repeatedly to get my hand down between my girl's legs. But she wouldn't let me. Sure did make for an exciting makeout session though.

My ex and I did that s few times. However a cuople times we swap and it was great!!!! Her getting and me next to her pounding to the other guys wife!!!!!

One time my wife and I slept in a one room log cabin along with one of our sons and his wife and baby, our youngest daughter, my best friend, and his son all sleeping in the same room. My wife and I fucked both nights we were there. I don't know if the others heard us, as we are not notoriously quiet, but no one ever said anything to us about it. LOL It was HOT sex though knowing all the others were in the same room.

My wife and I and another couple did these kinds of things a lot when we were younger (per my earlier post). One time I had built a fire in the fireplace and we wanted to have sex in the floor in front of the fire. We had a small sleeping bag that we opened up to use as a cushion and us and the other couple made love side by side, sometimes touching because we were so close. It was very erotic. My wife and I would always finish first, then just lay and watch, get horny and go again.

In college my girlfriend and I had a marathon session with each other while her roommate was asleep. I get hard just thinking about it...