One idea: If you use a tight grip when you masturbate, you'll have a ring of hemosiderin, an iron pigment from microbleeds from damaged capillaries, just beyond where you grasp it. It's harmless and lots of young men have this. If it bothers you, use a lighter grip or some other technique -- in fact, a smart guy varies his technique to prepare for different possible partners.
Answered 3/21/2017
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A doctor has provided 1 answer
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