Most of the poly people i know aren't particularly sexually active, they tend to be on the ace spectrum and they're just in a relationship where it's ok that one of them has a play partner to do a BDSM scene once in a while and sometimes cybers with me and maybe we have sex occassionally and the other has a cuddle buddy who she sometimes brings over to have a transbian slumber party. I don't think that's kinkier or more adventurous than what a lot of monogamous couples i know get up to.

idk maybe this whole stuff is actually easier when you're less horny. Like, i don't get jealous at all, at most i get envious. But envy is a different thing than jealousy, it's "i want that, too", not "you're not allowed to do that with anybody but me".

Edit: Also, almost all working poly relationships i know of have been / are between queer people. Straight couples (or straight guy / bi girl couples) seem to really struggle to make it work.