It's probably safe to say that females are culturally programmed to spend more time on their looks, to be spend more time looking at themselves. That indeed would fit with being more self-obsessed.

It's just the cultural prerogative, though, that a woman gleam every non-scalp hair from their body, masterfully paint her face at least once a day, to basically perform all the maintenance necessary to widen the sexual differences between male and female.

Largely done to fit into what a woman is supposed to look like -- color outside those lines and society will scorn, no doubt! Also, of course, to cater to male gaze. A woman who doesn't spend all that effort on herself is not even really a woman, they'd hear. Odd how femininity is tied to cultural practices of beauty in most peoples' minds.

So, yeah, it's safe to say women are more self-obsessed, and it's safe to say that the pressure to remain that way must be intense.