Why do in shape black guys want to date fat white women?

Is it genetic or cultural? Or I could ask why they do not speak or write with proper grammer or diction. I don't really think that at all but I was just illustrating the racial ignorance that I have seen on here from a different angle. It really bothers me that people do think like that. Why can't we all just... get along without thinking about color. With our global world and melting pot country experts say that we will all be mixed race in 100 to 200 years anyway. So why worry about another's skin color?