Originally Posted by Tonberry
I would say both or either.
For me, if you can have sex outside the relationship, then the relationship isn't closed.
However, my problem with closed relationship is that I feel it tells me I'm not allowed to fall in love, which isn't under my control and therefore doesn't seem fair.
So I would say a relationship can be opened one way, the other, or both, but can only be considered closed if neither are allowed.
That sounds true to me. I will add that sex is the usual means of enforcement because it's a behavior that's easily identifiable, even though prohibitions on both is desired.