Hide and sh*t

Hello,My son turned 3 two month ago, and still refuse to poo in the toilet (he categorically refuse to seat on the pot, so we bought him a toilet seat adapter). We started to potty train him in June and while he does pee in the toilet, he just hide in a corner to poo in his pant... I tried every method ( play it cool, bribe with toy, be firm... ) but nothing work. He knows the poo go in the toilet, but he want to poo in his pant and then I have to transfer the poo from the pant into the toilet.... I have not idea how to make him stop hiding and accept to sit on the toilet instead. Any suggestion? via /r/Parenting https://ift.tt/33MUIxz