hello, my baby (boy) is 3n half year old. he use to tell me whenever he wants to go for pee n poo. bt in case of poo he use to do it by standing position in bathroom, once he entered in bathroom for poo he push up the door n do poo by standing. I tried a lot to train him to do poo by sitting position as well as how to use potty seat bt he never do that. sometimes I feel he scared for that potty seats and to do by sitting position. please tell me what to do