B.C.
You might want to try to get a book or video of baby sign language and see if you can get him to respond to that because it's fun for them and can help you communicate better with him...kids can be stubborn in a lot of ways...my (almost) 3 year old doesn't want to use the potty..she knows how & has peed & pooped in the potty but when I ask her if she wants to go she says "naaa I want a diaper" sometimes they just have to want to do it and if he feels like you're pushing him to do it he may be rebelling a little bit...good luck.