D.S.
Have you asked him what he's concerned about? Also, I let my son pick out a $10 truck at Target and he sat on the potty and tried to poop every five minutes for two hours until he did it. I know some people consider this a bribe, but you should have seen how self motivated he was to earn that truck! He really worked hard for it and has never looked back. Just think about what might motivate your little one. Good luck!