If you were a thin woman with a moustache but no breasts you'd be saying that men go for the curvy women.
Too thin and a moustache = too masculine to be a partner
Too fat = problems of a physical nature as a human being
I'm not defending those ways of thinking, but I reckon they're quite common.
Having said that, though, plenty of fat women are happily married. As are plenty of flat-chested women with moustaches.