Do any of you guys have darker skin in your groin area? I have like semi-circular areas of darker reddish brown skin inside my legs. When my legs are closed you cant see it, but when open you can. Its in my groin area corresponding to where my balls are, but on my thighs. Is this just different pigmentation? I'm not sure if its always been that way. Is this something or a symptom of a problem? Thanks!!