Study after study shows that intercourse has all sorts of benefits for men -- for your blood pressure, heart and prostate health, pain, and more. Forcefully bending an erect penis can rupture the chambers that fill with blood, a rare but gruesome condition called penile fracture.
No one ever caught an STD from himself or made himself pregnant.
Even then, there's nothing specific about masturbation that's the problem.
Compulsive masturbation is like any behavior that disrupts your life -- whether it's compulsively playing poker or checking your social media every other minute.
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"It's purple and swollen." Most men need surgery to repair it.
Guys can get hung up on whether they masturbate too much.
Köhler has seen guys with it after vigorous masturbation.
"Afterward, the penis looks like an eggplant," he says.