An open-relationship

I don't even consider an open-relationship to be a real relationship. It's only a relationship by the loosest definition of the word. Sex buddies. People too weak-minded to commit to someone. A "get out of jail free card" for cheating. It's a relationship for people not looking for a serious relationship, really.

I would never be in one. I would want to be with someone who is dedicated to me. As in, actually cares about me. I don't think someone truly cares about someone else if they're okay with them off kissing, having sex, etc. with other people. Your partner having friends is something completely different.