Also, for some blacks the white woman is a race trophy. To a lesser extent the reverse is true where a white woman proves how liberal she is by having an intimate partner relationship with a black man.
Unfortunately, for the white woman it often ends badly. If she wants to end the relationship it is often taken as a racial insult by her black partner and violence results. Sociological studies have found that a white woman who marries a black man is 15 times more likely to be murdered by her husband than a white woman who marries a white man. In non spousal relationships this ratio is almost double that. Many times the black violence does not stop with the white woman. It is often directed against her children and parents too.
Much more at these links:
“297 whites murdered in intimate partner, interracial relationships with blacks”