"No...me no Dog Dog"

Dave has always loved to play with Luke by calling him "Dog-Dog", since Luke has always liked dogs, but doesn't like to be called "Dog-Dog". And that's where Daddy finds the humor. Well, I don't think Luke thinks that being called "Dog-Dog" is funny! Everytime Daddy calls him Dog-Dog he says, "No Daddy, me no Dog-Dog, me Luke." Last weekend, Daddy kept calling Luke "Dog-Dog." Luke left the room and came right back with his dog and said, "No, No, No, me no Dog-Dog. Dadda, this Dog-Dog (showing Daddy his dog), me LUKE!"