M.S.
Normal, normal, very normal! I have two boys, now 9 & 6. They both did & still do put their hands in their pants. Just teach him that this is somthing he does in privacy, because other people don't want to see him. If you tell him that he is bad, naughty, etc., he'll have issues. Knowing it is normal, just guide him in th eright dorection. He is still just a baby so don't make a big deal out of it. He'll phase out of it, and right back in again!! He's a boy so don't make him feel badly about his body, just let him know when & where he can do it1