Sam has decided that he doesn't want to wear jackets or sweatshirts that can function as jackets. As soon as he sees one coming at him he flips out. If I put it on him, he flips out more - screaming, kicking, throwing things, crying - and won't stop until it is gone. He reacts in a similar fashion to new shoes. He also gets out of sorts changing from pants to shorts or short to pants as the seasons change. But, the pants/shorts and shoes issue usually passes quicklywhen he realizes he isn't getting his way. The jacket thing don't seem to be going away. Interestingly, he doesn't mind long sleeve shirts. It is fun.