Dave: No, Jackie! Teeth are not for biting.
Luke: Except with food.
Luke: Except with food, Daddy.
Luke: Daddy, you use your teeth to bite food.
Back in the day, I had a refrain that I said to Luke, "No Luke, we don't bite/pinch/hit/pull hair. We kiss and hug." But once I accidentally said, "No Luke, we don't bite, we pinch and hit." Dave's was way better though.