Skin pigmentation is not even all over the body, as a person can tell from taking a really close look at just about any body part. There can be slight variations and gradings of color, not noticeable unless a person intently studies the skin. And sometimes color may vary due to other factors, such as heat or cold. But when there is a significant variation in color, often in a patchy way, a person says his skin has a rash - and if on his manhood, naturally, a penis rash. In some cases, a peni...


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