Odd that you say that as on a daytime talk show the star said her little boy just announced when he turns four he will poop in the pot, as he is three now, and won't go in the pot. I tried (when I thought it about time for them to need to go) setting them on their potty chair with a little book to look at, and sometimes they (accidently) went while looking at the book, and then I'd give a treat if they went poop in the pot. We'd be all excited. Your child acts scared if he holds it for two or three days, so maybe he had a hard bowl movement that hurt and now is scared. At this age I doubt spanking would help, if he were 6 that would be a different story, but I feel patience is what is needed now. My forth one had constipation, and went in his pants some, and I didn't disturb him if I noiteced him going I was so glad he was, and he wasn't doint it for aggrivation etc. or to defy. I'd notice him all of a sudden be over in a corner being real quite and sure enough that would be what was happening. I started trying to watch what he ate, and give him more water, and then a Dr. said colice drops helps put more water in their last intestines and they aren't constipated then, as it isn't a laxative. Hope some of this helps.