Frequent rigorous masturbation can cause friction. Scratches and cuts can also be problematic. Using a lubricant can help avoid this problem.
Perhaps the most harmful aspect of masturbation is the anxiety and guilt often associated with it. I am frequently asked if masturbation can cause ill health, whether it causes baldness, blindness, madness, you name it!
Expressing sexuality through masturbation will not make you physically ill. Anxiety about masturbation can make you feel bad though. Remember expressing your sexuality through masturbation is a normal healthy part of being a man (or woman).
