I found no mention of his changing skin color on Wiki, but it it possible he’s got Vitiligo? http://en.wikipedia.org/wiki/Vitiligo It’s a disease that causes depigmentation in the skin. White folks can get it too, but obviously it’s not as pronounced when it happens to us. It can be pretty unattractive – walking around kind of like an inverted dalmation – so lots of black people try to cover the patches up with makeup or just wear as many clothes as possible. Some people have their skin bleached to try and match the decolored patches, or make ‘em less noticeable.