Kicking people in the face would be bad.
Kevin is watching his son pull the tail of their dog, which has been known to bite people who pull its tail.
Kevin wants to prevent his son from being bitten by their dog.
Kevin teaches his son how to pet the dog's head and back.
Kevin kicks his son in the face to push him away from the dog's tail.
Kevin's son pets the dog's head and the dog licks him in the face.
Kevin's son loses three of his front teeth and has to go the dentist.