I dunno, it's a valid point. Maybe it's because we perceive the woman as in control with regard to starting new relationships?

Let me amend:

And why do the tall men ALWAYS pick the short women?? Listen buster, leave the short women alone they have all the short men to pick from!

Incidentally, my grandpa was tall and he picked my short grandma to marry. My short cousin picked a tall man for her husband too. Go figure. :-)