Watching other couples fuck right next to us is a huge turn on. Went traveling with good friends and all weekend long we heard moaning and fucking throughout the house. The best part is after watching the show, we get to join in.
When you finally meet that couple you are so relaxed with and call your friends. It feels just like a relaxing summer day by the pool. Except there's a lot more oral and somebody's about to get fucked on a floaty.