The Rothschild effect, as you could call it, is well established in sociology research: Men everywhere want to marry beautiful women, and women everywhere want socially dominant (i.e., intelligent) husbands. When competent men marry pretty women, the couple tends to have children above average in both competence and looks.
http://members.forbes.com/forbes/2005/0815/096.html
http://members.forbes.com/forbes/2005/0815/096.html

