I'm a sixteen year old male and I have a bruise on my penis that won't go away. I used to masterbate frequently when I was around the age of 13-14 then slowed down after a while. See now when I used to masturbate I would grab my penis by grabbing from the glands on the foreskin. Which explains why the bruise is around my penis(as if you were using the index finger and the thumb in a "ok" sign).