Where's your eye?

we've be trying to teach Cooper where his eye, nose, mouth, etc is. If we say where is your nose or mouth he just smiles. If we say where is your eye? He says "eye" as he puts his finger in his ear. It is so funny! If he hears the word eye of I in a conversation, he says "eye" putting his finger in his ear.We get the biggest kick out of it because if you ask him where anything else is he just stares at you and smiles, but the second eye is said, there goes his finger.