Maggie's Farm

From Mate Selection for Modernity:

This mathematical model offers key insight into our unbalanced sexual marketplace. The number and weight of a woman’s mate preferences is negatively correlated with the number of eligible mates that are available to her. Thus, the distance of a prospective mate to a woman increases with each new preference she adds. Put simply, the more you demand, the less you receive.

More generally, there’s a disconnect between what women want and what is actually available to them. Whereas greater male attainment increases the number of romantic options a man has, greater female attainment reduces the number of options a woman has.