Black men and Asian women: The final taboo?

Yes, i have the balls to say why it doesn't happen. For some people, the thought of a black man dating an Asian woman is unpalatable.
It is uncommon in this country, the violence associated with such liasons means that it has to be done in secret. Why? In a land where interracial relationships and marriages are common, why shouldn't black men and Asian women date and marry, and why is it covertly forbidden in the UK?