A certain guy writes:

Despite all the sound and fury, I don’t see too much of it. Most people date *long term* within their race. There are likely evolutionarily mediated reasons for this. Women are more racist than men in the realm of dating. They are less open to having relationships with men of different races, while men are bigger whores who will happily **** a cute chick from any race.

(Edited for profanity.)

The difference between male and female sexuality, to which Dr. Laura often alludes, should be obvious--women seek to bond and nest, having a fuller realization of the consequences and demands of having offspring, while men are urged on by instinct and emotion to couple with women. If they approach sex from that level only (which would be disordered), men are usually less picky. Women, on the other hand, have an image of their ideal mate and partner, and seek someone who fits this image. As this image is influenced by the relationship they have with their father, it should not surprise us that they look for someone similar even in appearance or ethnicity/race, perhaps unconsciously. Those who have a poor relationship with their father will perhaps reject someone who reminds them of their father, at least in appearance or ethnicity. And yet they may be attracted to someone of a different ethnicity who resembles their father even more with respect to his character, because they are seeking to repair that father-daughter relationship. Such is the power of the imagination. (And its limitations.)

It's not because of evolutionary psychology, but the role the imagination plays with respect to our understanding.