Not to be too pointed, but that attitude is socialized, largely by people who make statements like "It would be weird if it were for men." Also, I think that there is less of an imbalance than you would believe. As we know, people are quite good at saying one thing in public and doing another in private. Especially when it comes to sex.
Not to be too pointed, but that attitude is socialized
I would disagree with at least the strong form of that assertion, on the grounds that evolution actually does stuff. Males and females have very different genetic payoffs for having lots of sexual partners versus holding out for a high quality mate.