It's a natural thing that you don't want to share someone you REALLY love. I know some swinging couples, they all started after years of relationship, probably because they got bored with each other...love is gone, it's more like a friendship. Watching a friend fuck someone else is no problem.
I don't think we are made for eternal love, but when it's over it's over and all this talk about "Hey, we are just open minded" is just a lie.
