My oldest son is four and a half years old. For two and a half years, he has been fully cognisant of the mechanics of going to the toilet. He knows when he has to go. He knows how to go. He can hold it. He doesn't wet the bed. But five or six times a day, he pisses or ****s himself. We've tried absolutely everything. We've read every book. We've tried every reward and punishment imaginable. We've taken him to a psychiatrist. We've given him ownership of his own bodily functions. We gave him a whole year with zero pressure for him to decide on his own. His brother, who will be two next week, is fully trained. I thought for sure that would push him over the edge, but no. He doesn't care that his peers ridicule him. I'm at my wit's end. What the **** will make this child not piss and **** himself? He has seriously never once in his life decided to go to the bathroom himself. The experts are all wrong. I need help from somebody who is not a pediatrician or child psychiatrist.