I think black dudes who do this re either not conscious of the optics or is such delusion and denial to not fathom how it looks and how you are accepted in this society...
I mean if you are a conscious black man aware of his place in society and our collective struggle as black folks your brain probably screaming at you for even trying to date a white woman knowing full and well the slings and arrows are coming after you, the fighting the tension, the stares, the racial animosity of others judging and attacking you...not will probably drive you crazy and you realize it ain't worth it. In a color blind society it would be ok but we are DEFINITELY NOT THERE YET...
fukking is one thing, serious relationship and marriage is another