...What?! You're surprised that rational people who are in demand can get what they want?

Depending on what "what they want" is, yeah, I might be surprised.

I mean, clarify for me, what are we talking about here? "Polyamory is relatively common in rational circles, and poly relationships in said circles often/sometimes/commonly consist of (i.e., are circumscribed by) one woman who is dating several men"?