Okay, I'm not talking orgies or gangbabangs, or being on pay per view or pornhub, but sex in front of non participants and you didn't mind who saw you. That could even include if you ever did a live sex show.
Back in college my girlfriend and I were having at it at her friends apartment. Since her bed was in the dining room area, it was the only way to get from the living room to the bathroom or kitchen. Her roommates and their friends knew what we were doing and decided to grab a bite and watch the show. Her two roommates and two other couples.
Six non-participants total