 [ Symptoms ] why has nearly all my under arm hair disappeared in the last couple years  i am a 66 year old male in good health overall is the hair loss part of the normal aging process [ Disease ] most helpful answer masturbation will not change the diameter or overall size of your penis frequent ejaculation will decrease your sperm volume and sperm count but only temporarily masturbation is considered safe but if you feel the need to masturbate 15 times per day you need to find another hobby the most obvious effect is skin damage i mean thing like chafing dryness soreness and even a loss of sensitivity these all negatively impact one is sex life so you definitely should use a penis health creme every morning these are made to protect the penis from masturbation induced issues they work very well i use one called man1 man oil you should check it out hope this helps