I have a nice little video from Playboy TV from their series called Swingers.  Basically what they do is they get submission from couples who are complete amateurs and want to try out the swinger lifestyle.  They pick a couple and send them to a swingers house where basicallyt here is just like 6 couples who are all “professional” swingers.  They then take them to the sex room and each of them switch partners fucking whoever they want.  So you get to see a couple cheating on each other basically but they don’t care that they other one is fucking someone else, seems like a pretty sweet deal.