I'm not the world's biggest relationship person, but when I am in one, I'm largely traditional. Despite the fact that my jealous side would totally squash any chance of an open anything, I think the facets of dating and relationships are getting more and more troubling with each generation.
Don't get me wrong, I'm not the type to judge what other people do in their own relationships. But I know for me, the concept of commitment is pretty cut and dry. If you didn't want to be exclusive with someone, then why be in any kind of relationship? Just call it what it is--casual, non-exclusive dating.
I have heard stories from friends about this kind of relationship, in where the guy forces non-exclusivity but realizes how much he wants the girl in the end. Yeah, after he's been through everyone else and gets tired of running game every other night. Call me a cynic, but if a guy wanted to be with you, he shouldn't need a procession of multiple girls to figure it out.
Maybe it's one of those things, like you can't say you hate mustard if you've never had it. I wouldn't know a non-traditional relationship or how it works, but i don't intend to find out soon, either.