Saw a link about "happy couples" that fits in with the theme of the day, so went to take a look and found this fascinating tidbit.
"Coupling up with an average Joe (with a beer belly) may be the key to long-term love. According to a study in the Journal of Family Psychology, when men were married to more attractive women, they seemed more likely to step up to the plate, says study author Benjamin R. Karney, Ph.D., a professor of psychology at the University of California at Los Angeles. "But when husbands were better-looking, they didn't seem as engaged in helping their wives achieve their goals." (Size matters too: When women had a lower BMI than their guy, both partners tended to be more satisfied, according to other research.)"