Racism is when different races join together simply because they're different races. White chicks who hang with black dudes, like to be dominated (or they're too fat to date white guys), because most white men aren't dominating. Especially in bed. Some are rude, crude pieces of shit who treat women like dogs. But for the most part, white guys are nice and try to make things equal.
Most black dudes simply dominate.
This is why some black chicks like white guys. They're tired of being dominated.
Every white chick I know who's screwed a black guy said they did it out of curiosity.