I think it's toxic when you treat a real person like an object or a stereotype because of a race fetish, but it's okay to have preferences for physical traits. People search "big boobs" or "big ass" or "redhead" all the time, and it's just a matter of them being in the mood for a particular trait in that moment. Skin color is just another physical trait, and I think it's okay to seek out content that includes physical traits that you find appealing.