Indeed, natural selection discriminates against well-behaved losers. — Olivia Judson

If a proclivity for promiscuity is genetic, then yes, promiscuous behavior will become more common if loose females tend to have more children than their monogamous peers. That’s how natural selection works.

You’ve just got a case of SINBAD: Single Income, No Babe, Absolutely Desperate.

I’m afraid that females in many species often provoke males into fighting over them. When the mood strikes, they make themselves conspicuous—then stand back and watch the battle, before mating with the winner.