I think the last person (Ribiq) has the right idea. He can definitely be cured. I've seen numerous famous people (wish I could think of one right now) on tv who said they have overcome it. Singing, as was mentioned, is a good one. Stutterers don't stutter when they sing. He should sing as much as possible. Meditation could help. It often comes from a childhood trauma. I would Google it, if I were you and see what kind of people work with this problem and what they do about it. He may need a professional. Do your research and follow your instincts on picking the right help. Good Luck.