Metamour

"I get it less with women who are bi and poly than with women who are monosexual and monogamous/monoamorous, but I can't put my finger on why, and there are exceptions in both directions. I get it less with metamours than with women who are unrelated, but maybe that's just because if my metamours were alien to me, there's a fair chance they'd be alien to my partners too, or conversely that I'd have been alien to the partners when they were still just potential partners, and hence we'd never become metamours in the first place."