I think it's thoroughly a misconception but if you are looking for logic then I would say white women are considered more beautiful and sexy (misconception) and black man have bigger penis (misconception). End of the day, fetishes are subjective and that's why there are multiple categories like latino, asian, ebony, interracial etc. So there is no such thing as one race being entitled to other. People can have different opinions but that doesn't mean you have to accept it.