Hmmmm
Learn to share, and NO biting!
In kindergarten, I was outside at recess with my friends, and the teacher gave us a big rubber ball to play with. She told us to share it with each other.
My friend Kathy wouldn't share it with us as instructed, so I bit her on the arm in an attempt to get the ball.

The ball was taken away from all of us. I learned it's not appropriate to hurt others in order to get what you want.
Fortunately, it didn't leave a scar on her. She went on to be Miss Illinois, then a finalist in the Miss America pageant in 1976.