Over the years I've observed substantially more White women in the company of Black men than the reverse. In fact it is relatively rare to see a White man accompanying a Black woman. This obvious disparity calls to mind implicit suggestions found in common literature wherein ideally attractive women are referred to as "fair" maidens" while ideally attractive men are described as tall, "dark," and handsome."
Comments are invited.
The more parsimonious explanation is that race overlaps with sex appeal.
Men find feminine women attractive. There exists a hierarchy of femininity with Asian women at the top and black women at the bottom. The reverse order for men. Black men are most masculine to women and Asian men the least.
This explanation works very well to explain the rank ordering of interracial couples. Asian women have the highest rate of marrying outside of race and black women the least. Black men the highest rate and Asian men the least.
Black women and Asian men are the ones most often left standing in the game of interracial dating Musical Chairs. They are also the two groups who most complain about people engaged in interracial dating. Black women don't like white women stealing black men and Asian men don't like white men stealing Asian women.