Ugh, I just sat and read this entire thread and it got me right in the feels; I kept switching from

to

and back again as it went on.
I had a friend in her early 20s who was into poly and kept asking people why they weren't comfortable with the idea, or even discussing the idea. Her attitude was that monogamy = "territorialisation" and that it's natural for people to want to fuck around, poly/open relationships just allow it to happen without cheating.
I told her that I didn't like the idea because I don't want to be lying in bed at home, alone, depressed, while someone I love is banging some random dude. I told her that I didn't want someone else to be getting the sex while I deal with all of the emotional difficult stuff. She said "oh but that's a
bad poly relationship, most of them aren't like that."
I gave that a big X to doubt. We ended up agreeing to disagree.
I'm so glad no-one I've dated has ever tried to pull this bs on me. "If you don't allow me to bang other people, it's over." Like, what can you do in response to that? "Okay it's over" is the best response, of course, because by then it really is - but I can understand that if you love someone deeply you might want to try to cling on to whatever part of their life you can still have. And you just know that if the partner says "okay it's over", the poly person will be like "omg he broke up with me because he was too closed-minded to accept who I really am bawwwwwww".
I can't even with these people, as the millennials say.