I mean to me it would be hard to feel special if my girlfriend was crawling into some other guys bed on mondays wendays and fridays.
Because people are finally accepting the fact that monogamy is an unattainable ideal and attempted adherence to it is a form of pathological delusion based thinking. Now you can do just about what ever you want with the idea there is no consequences for the actions performed.
I think he's much more the monogamy type, but he's convinced he doesn't have time for a full-blown relationship, so he's settling for this arrangement although he's told me he knows it isn't sustainable long-term.
someone who is otherwise a great match but does not believe in monogamy.
in fact a week ago I wasted 3 hours having a great conversation with a very attractive woman only to find out that she was poly-amorous and I would have to meet her boyfriend at least once and that her, her boyfriend and his other girlfriend live in the same house.
I politely told her i was not interested, and she gave me her business card in case I opened my mind.
There are many mixed mono/poly relationships - they're not all either just mono or just poly. Poly may even be a more natural way to have one, since I think monogamy is more of a social construct, albeit one that works reasonably well for the majority, at least part of the time.
Real poly relationships lessen cheating considerably, whereas cheating is a common issue with monogamy. I have a guy friend who is sort of in one of these arrangements (he's the "secondary" to this woman's boyfriend) and has already had lots of issues with it.