Black men all over the world have been breeding white women since the beginning of the world - that is how all the different colours came out in the various races.
Their is a hybrid vigor that comes out in the genetics from a black on white mating and a colourful skin.
There was a time when white men tried to stop cross-cultural mating, but they failed, and it has sped up in recent times because large numbers of white women want to mate with black men. The Constitution provides Freewill to do so, and the predjudices are reducing every generation.