I don’t think it is all that simple.
ISTM that, at least in the US, white women are more attractive than black women, not because of anything inherent in blacks or whites, but for a variety of other reasons. White women are more prominent in the mass media, which is consumed by blacks and whites alike. Black women tend to be overweight more often than white women (it shouldn’t be necessary, but to forestall the inevitable), and obesity is not generally as sexually attractive as normal weight).
Another factor is that white women are higher status social partners than black women. In some circles, it is a mark of distinction for a black man to date a white woman in a way that dating a black woman is not.
Claude Brown wrote an autobiography back in the 60s called Manchild in the Promised Land, in which he describes his growing up in Harlem. As he grows up, he begins to withdraw from ‘gang culture’ of the period and begins to identify with a sort of beatnik, Bohemian, jazz subculture. He begins to play jazz piano and gets an apartment in Greenwich Village and so on, and also begins to date a white woman. And one of his friends comments that Brown is now fully part of this new subculture, because he has a white girlfriend. And Brown is taken aback by the realization that the new subculture that are just as stereotyped as the culture he is trying to leave.
Dating white women can also be a way of reacting against white prejudice by living up to the “Bad N*gger” stereotype - the sort of Cleavon Brown “Where da white women at?” thing that can be played for laughs now. Jack Johnson, the first black heavyweight champion, did this a lot, marrying white women, and eventually getting busted for transporting white women across state lines.
De gustibus non disputatndum est, but there are social factors that come into play even in matters of personal taste.
Regards,
Shodan