What's Cookin', Good Lookin'?

It's funny. He walked right over and put that apron on all by himself; seemed like he knew exactly what he was supposed to do with it. We put it on him once before - maybe - and even then, it was a while ago. On the other hand, he just goes over there to press the button on the grill - with no food on there. If you ask him to cook you something, he looks like he has no idea what you're talking about. How did he learn that he was supposed to wear the apron, but he doesn't know to pretend cook? It's weird what they figure out all by themselves and what they miss....