i've gotta defend the under dog here....what about the bad boys or social misfits that women consider it a challenge to conquer?? Get him to to change his hair, clothing, and general style...and then she gets bored with him since she took away the thing that excited her to begin with.
And let's not forget that everyone puts on their game face when they first start dating. Typically, Men do act more overtly romantic in an attempt to make women swoon and feel swept off their feet....while women typically act like a lady who is exceedingly receptive to his laskluster charms and jokes. And after a month or so, the gloves come off with both the men AND women.