How Often Do Men Masturbate? Men Does masturbation decrease testosterone? Do You Masturbate Too Much?: What You Need to Know Hello Doctor What Happens If Men and Women Masturbate Daily? All about biology [Educational purpose only] In Males: Helps maintain prostate health Doesn't lower testosterone in normal range, but excess may cause fatigue Want to know the secret to unlocking a better life? Masturbate at least four times per week.