It occurred to me today as I was cleaning up Jacks banana mess (he pushed a chair over to the counter and managed to open two bananas and smash them all over the floor) maybe this is an example of self-fulfilling prophecy.
We call Jack monster - and he acts like a monster. We call him monkey, and what do monkeys eat? yes bananas. Well from now on I will call him 'sit on the couch and don't move'. Or maybe I will take Clints suggestion and tie him to a stake in the backyard with enough slack so he can move around - a little.