I keep reading and hearing that "women are the gatekeepers to sex" and I don't get it.

Logically, it is an equal exchange. Both get pleasure.

So how come it's women who are the gatekeepers to sex?

Is it because women have lower sexdrives/libido?

Is it because guys have lower standards and would fuck any hole if horny enough which makes uglier women have inflated egos?

Is it simply because guys want sex more than women for the reasons above?

So, like a supply and demand thing? Basically simps are giving the women the power?

TL;DR: Because women are deluded and narcissistic because simps kiss their feet. Males have higer libido. Is this the reason?