We each make decisions for ourselves.
I don't think I'd operate under any other power dynamic--certainly not one where somebody else would presume to choose partners for me. Nope, I'd likely have to slow roast and eat anybody who tried to make that sort of decision for me. I keep an extra bottle of BBQ sauce around for that day when I decide to toss the kittehs in the slow cooker and I could use that sauce on somebody trying to make decisions for me.
When speaking of various forms of non-monogamy...it ain't poly if you're just fucking around.
While polyamory, open relationships, and swinging are all distinctly different approaches to non-monogamy, they are not mutually exlusive. Folks can, and some do, engage in more than one of them at a time--and it's all good.