Not all, depends on the social/education background...maybe in the lower education social classes.
I know a black guy who has his masters and is dating a white woman and he truly loves her and is not using her. He is a great guy. Kinda has that Denzel Washington look.
I'm also seeing more white guys date black women...again they are dating the educated, ambitious ones.
Jungle Fever strikes again.
I'm sure that's the situation in nearly ALL the instances.
/sarc
ROFL