The definition of a privilege is:

A right or immunity granted as a peculiar benefit, advantage, or favor

An advantage that only one person or group of people has, usually because of their position or because they are rich

The key words here are advantage and benefit.

What advantages or benefits do women get out of having sex? What benefits do women get out of having easy access to sexual encounters or casual sex?

The negative social impacts of sex for women: -According to most of the men here, and as evidenced by almost all of human history, when a woman engages in sexual activities, regardless if that is within a committed relationship or not, her value within the sexual/romantic marketplace drops. -Social shame and ostracism

The negative physical impacts of sex for women: -Women are more prone to getting STDs -Women risk pregnancy, and while abortions are more accessible than ever for a lot of women, an abortion is not some frivolous and easy procedure, it comes with its own risks and painful complications

So I’m confused as to what perceived benefits women get out of having easy access to sex.

What, they can satisfy themselves when they’re horny? Not really as most women don’t orgasm from causal sex, and a lot of women don’t even orgasm from sex while in a committed relationship.

I can agree that women have an easier time getting into relationships, and that this can be a privilege for women as there are clear benefits. But I do not see any benefits for the average woman being able to have sex with dozens and dozens of men. Especially casually.