A guy does not like a girl just becos she's a girl.
One factor commonly used by guys to judge a girl's
attractiveness is her waist-hip ratio, which is determined by
certain fat deposition patterns which maximizes a female's
reproductive potential and sexual attractiveness.
Females with high fat deposition in the hips tend to suffer from
a variety of health disorders eg. Infertility, hypertension, heart
diseases.. Thus, waist-hip ratio is a good indicator of gd health
and fertility and thus teh chances of reproductive success.

it is not that. it is all about ego with a pretty girl