One day a little girl was sitting and watching her mother do the dishes at the kitchen sink. She suddenly noticed that her mother had several strands of white hair sticking out, in contrast on her brunette head.
She looked at her mother and inquisitively asked, "Mommy, why are some of your hairs white?"
Her mother replied, "Well, every time you do something wrong and make me cry or unhappy, one of my hairs turns white."
The little girl was silent for a while, and then said, "Poor Grandma. You must have been a very, very bad girl."