If that's even true, that's porn weirdness, not actual real life attraction. For whatever reason, a lot of people love the fantasy of interracial stuff (as well as other weirder stuff), but it's still most common to date within your own race.

'But the porn' is not an argument that reflects reality. If it was, based on porn trends, everyone would be fucking their (step!) moms/sons/daughters/fathers/sisters/brothers/etc., and most women would be lesbians.

Porn is not reality.