This may seem like a loaded question but I am genuinely curious and not sure how to ask it "properly": what is the "known difference" between someone who has li

This may seem like a loaded question but I am genuinely curious and not sure how to ask it "properly": what is the "known difference" between someone who has lighter skin than someone who has darker skin? Or the known difference between sexes (other than genitalia, obviously)? On a side note I want to say thank you for keeping this discussion open, honest, and civil -- conversations on this subject rarely are.