I guess what the original poster is talking about is a need (some) people have for sexual variety as in multiple sexual partners during their life cycle, which isn't really what inspires the most polyamorous people, I guess. I mean, there is swinging and open relationships for pure variety-seekers. I am someone who considers herself to be a very sexual person, but I would have no problem for at least the next decade or so to engage in polyromance only with no physical relationships with any of my loved ones. Polyamory, for me, is about being able and willing to express 'couple love' towards more than one person at a time. It if it includes sex, great, but for a variety of reasons, not all couples are sexual with each other all the time during the course of their relationship. Love doesn't begin and end in between the sheets.
Me: bi female in my twenties