Some friends of mine (2 couples) have open relationships.
They love the person they are with but both partners sometimes feel the urge to sleep with someone else. They believe love and sex are connected, but also exist mutually exclusive. One couple actually shares their experiences with eachother, learns from them, etc. The other basicly sees it as something that simply exists but they dont want to know whatever one another did with someone else.
Personally i believe if both partners are OK with it, why not. But i see alot of risk in it aswell. Have you ever had this kind of relationship?