I think that it depends on location, in the Netherlands I see way more WMBF than BMWF couples, the most common interracial couple is obviously WMAF, but AMWF is a close second, if I count Mulatta and Mulatto as separate from Africans than I see BMWF and WMBF couples in near-equal numbers with only slightly more WMBF couples. Mulatta's are largely a coin flip, most date White men if they're nerdy comic book and video game loving girls, but if they're ghetto rats they go for Black men.
My guess is that where the Mulatto grew up determines what person of the complimentary sex they will hook up with, since it's more common for them to grow up in White neighbourhoods I think that most marry Whites, though I rarely go to Niggershitholes as I live in a mostly White neighbourhood...
As for Blacks and Asians, I often see Asian male Black female, but only very rarely Black male Asian female. My guess is that Asian men know that Asian toilets mostly go for White men so they go for the lowest hanging fruit (Black toilets), but us Black men can't compete with any other race so we're either stuck with Black toilets or very ugliest of the White toilets.
Black toilets and Mulatta's I see with White men usually get a Chad or Chadlite, meanwhile White toilets with a Black man are ugly and only get top tier Tyrone. So it's just the general trend of JBW (just be a woman) and get the top tier of the other race. Even the ugliest Mulatta is picky with White men.
