Chalkboard Culprit
One day a teacher went into her class room and saw the word,
penis written in small letters on the chalkboard. She
erased it and went on with the day's lesson. The next day, she came
in and saw the same word on the chalkbaord, but a little bit
bigger. She erased it and went on with her lesson.
Each of the next several days, the teacher would come in to find
penis on the board, a little larger each time. She went
in one morning, expecting to dinf it again, but instead the
chalkboard read: The more you rub it, the bigger it
gets.