I know a lot of black women who mix with white men because they subconsciously know it s the best for the eventual offsprings. Their genes have better odds of survival if they "whiten" them. Most of these black women are often religious, either catholic or protestant. Still, they are an extreme minority. Also, not many white men want black women... Educated black males who date white women also exist, but their couples fail more often due to the black man 's genes taking over. You have low lives black women with white men, low lives black men with white women, and then you have educated white men with black women, and educated black men with white women. The difference between succesful unions and failed ones? The level of education, spirituality.
Which means it's all a matter of intelligence, not skin color, in the first place. Still, there are more dumb people with a colored, dark skin, than white ones, for historical, anthropological reasons.
Smart people of all colors stick together, and dumb people of all colors stick together.