My son is turning five in a couple of weeks. He is still not completely potty trained. He will go on the potty if he has nothing on and usually goes on the potty about half the time when wearing underwear. We have just tried bribing (my second to last resort) since nothing else seemed to be working, but he just went poop in his underwear and my husband spanked him for it. We have not discussed this. We discussed the bribing. And he refuses to apoligize.