VIDEO Doctor Says: Often Masturbates, Makes Your Knee Empty, Myth Or Fact?

There is a myth that frequent masturbation makes the knee empty or the knee hollow due to frequent masturbation. The jokes of a number of young people often knock on their friends' knees to find out. Is it true, the myth? What is the scientific explanation, the result of frequent masturbation and the causes of hollow knees? Listen to the Doctor's Word.