Beauty, in the age before mass media, is not a centralized concept. So one usually grow up with an opinion of beauty that is defined locally. Hence even the strange long necks, modifications body parts like smaller waists, shoes…. All were considered beautiful in a limited context for a limited people. One might say something like facial symmetry is a necessary condition for beauty but nothing much is asserted beyond that.

After mass media monopolized what defines beauty, they initially picked mostly white women as beautiful. Now they are doing the same to Asians and blacks. Later on we have a society that fetishes these races(especially white women and black men) that ends up creating a brain that finds its own people ugly

So in short, If you are of a certain race, ensure your kids consider that race to be beautiful through literature or counter media sources.

These kinds of questions only help the forces of globalization and centralization which in principle the sub is against.