Interesting question. I'd be siding with megaboom. Black on White racist porn doesn't need to exist, because that's just the 'interracial' category already - ruined women with a degradation fetish, being humiliated as a proxy for all whites (sometimes with a humiliated bisexual white male looking on, proving the point). It's just animal porn but more safe; 'wow, white women really will fuck any old gorilla!'

I highly doubt white on black racism porn exists, with a white guy screwing a black woman and calling her a dirty nigger slave sheboon, or whatever. They would have to do even more geoblocking for countries with hate speech laws for a start.