hi sir/ ma'am....i am 20 year old and musterbating from last 7 years. some times twice ,even thrice but normally once per day. Now m worried about my future. But i am not able to understand the problem, my penis erects normally, my sperm volume is good...If u stops for one day, then next days it gies more pleasure and sperms too....can u tell me the signs of the problems of exess musterbation. I also have a pimple type structure on my penis since my childhood. It is below the lip type structure, where skin is atteched to the penis. Is it a cancer? what should i do?