My friend says can't stop masturbating he says he does it every morning and every night?

Masturbating: If his masturbation is pervasive or interferes with his regular activities or becomes disruptive he should seek help with a counselor otherwise he may be okay and should engage in exercise and non sexual social activity to reduce frequency.

He's a man: This isn't at all unusual for a teenager. This keeps a guy comfortable and able to focus on study and work, and prepares him physically and emotionally for love and marriage. Only somebody who's trying to control him by misinformation will tell him that he needs to stop. If it's taking over his life, get to a physician, but that's rare. Think about something wholesome -- maybe his future bride.