Andrew's learned to say "ow" anytime he doesn't want us to do something. Sometimes he'll even say, "Oh ow ow ow ow!" under his breath. At first I was a little concerned, really worried that he was hurt, but when I realized he was just being smart, it kind of cracked me up. He does it when he's getting his diaper changed, when he's getting dressed, when I take something away from him, you name it. He's a hilarious little guy.