Little Johnny was in the fourth grade. Everyday, he would bring chocolate covered raisins and eat them during class. Finally one day his teacher told him, "Johnny, if you are going to eat those in class, you must bring enough for everyone."
Little Johnny said, "OK."
For the next three months, he would bring chocolate covered raisins. Then one day he suddenly stopped, his teacher asked him why he had stopped bringing raisins for everyone.
Little Johnny replied, "My rabbit died."