N., I'm sorry that you're going through this, and that I do not have any personal experiences to offer. However, I wanted to quickly say that I've understood that some kids are okay with peeing in the toilet, but are afraid of pooping in the toilet. I am one of five children and my mom said that when a couple of us were potty training, we would balk about sitting on the regular toilet because we were afraid of watching the toilet flush down our poop, something that was once a part of us. She handled the situation by letting us poop on a training potty, then having us take it to the toilet, saying, "Bye, bye poopy!" and flushing it when we were ready. Eventually we became less afraid of the toilet and didn't need this in-between step. I know this sounds completely crazy, but when I researched potty training before starting to train my daughter a couple of years ago, I actually came across several articles that mentioned this problem as being common among kids. I do agree with the others that I would not deal with this very long before taking my son to the doctor. Someone I know had a son that worked himself into a frenzy over going poop on the toilet, they let it go on too long, he became extremely constipated, and then began to even withhold pooping in his diaper because it had become so painful for him. It became a terrible situation that took him months and months to get past, and I really believe that it didn't have to go that way. Good luck!