Face it, it's all because people, (especially women) are swayed by the media and pop culture in general to think that "Hey, black guys are like cooler and stuff because they're all over the place on TV and that's all ya see on MTV and stuff, so like I wanna be cool and fit in and go with the latest trend! Like OMG I bet the girls will just die when they find out I got a black man! Oh damn I hope he beats me and calls me ho' and stuff!"
Seriously, I dare anyone to prove me wrong on this one. Very few white cracker bitches wanted a black man 10 years ago when the ghetto scene and rap/r&b wasn't anything cool.