As a general guide, within any socioeconomic stratum, the premium chicks were swept up by the prescient dudes - circa age 18, the prescient blue collar dudes grabbed the best blue collar chicks they met in high school; circa age 22, the prescient white collar dudes nabbed the best white collar chicks they met during undergrad, circa age 26, the prescient geniuses grabbed the best genius chicks they met in grad school, etc etc etc. But there comes a point where, if a chick hasn't been snapped up by a dude, then there's probably something at least moderately wrong with her psychologically.