But what is the advantage associated with being female in this particular example? The only thing I can think of is that women are better at the task of being satisfactory sexual partners for heterosexual men.
Gender normative females have a much easier task when it comes to finding casual sex partners than average males. This advantage could be said to have some similarities to the other advantages listed.
Yes, but that doesn't make sense in context. OrphanWilde's point was that possessing advantages leads people to expect that you will deploy those advantages in their favor. When a man approaches a woman for sex, in what sense is he asking her to deploy her advantage in being able to find casual sex partners? The fact that men approach women for sex may be a manifestation of that advantage, but it is not caused by that advantage in the same way that people approaching strong people to lift things is caused by the strength advantage.
P/S/A: There are single sentences which can create life-changing amounts of difference.