S.M.
My daughter was the same way, she wanted to control the situation. Only for her instead of having wet accidents, she was holding it for a very long long time. I would start worrying excessively after six hours, eventually she got a urinary infection and the pediatrician said to let her take the lead on this. Clearly the dryness was a sign that she was biologically ready but holding it was a sign that she wasn't psychologically ready. We put her back into diapers and one day (8 months later) she said she wanted to wear princess underwear (like all the other preschoolers) we told her underwear was for big girls who went pee pee in the potty, she said she wanted to and never went back to diapers. If you can wait, I recommend wait for him to tell you he wants to go in potty. We loved having NO struggles. Good luck.