My kitty Checkers learned to ask for doors to be opened by putting his front paws on the doorknob... I love it because it gives me an easy opportunity to tickle his tummy before complying with his demand

He also learned to come to have his cheeks scratched when I make a little scratching motion in the air with my fingers... but he doesn't know his name, he just knows he's the "kitty-kitty-kitty." (Not that he usually comes for that, but he will turn his head! )