Hi , I am an 18 year old male , in my adolescent years(13 to 16) i used to masterbate by dry humping my bed, i did that waaay tooo often , anyways i have brown skin on my penis from friction it is only on the right side of my penis where i used to rub against , i was wondering what this condition is , and is it curable? plleeeeease help ,any reply would be veeeery appreciated , thanx in advance.