I am white and my elbows and knees are a little darker, especially my elbows. I considered it dry skin since I live in a very low humidity area and am getting older (which dries out your skin more). I don't think it has anything to do with weight.
However my honest answer to this question is: I don't really know. More.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.