Did Anyone Else Do This In Highschool?

I never thought much of it, but I'm finding out not as many people did this as I thought. I was a bit more of a voyeur than I realized.

In our group of friends there were 3 couples and we would go on alot of group dates. All of us ended up dating for 2+ years. We would usually go to one of the girls house because she had a nice big basement with a big TV and enough seating for each couple to have their own couch. We would get under a blanket and each couple was having their own little make out session. Jr year of High school we had all started to have sex on our own, but then our group date basement make outs, evolved to us each having sex all next to each other. None of the couples ever crossed over and there was no swinging or anything, but it was 3 couples all having sex in the same room at the same time. It was kinda like group sex without any intermingling.

It came up recently with some friends and they were all shocked that I used to have sex infront of other people.