One day, a teacher walked to the whiteboard, she noticed a tiny word "penis" scribbled on it . She simply erased it .
The next day, she walked to the whiteboard again and she saw , in larger font , the word "penis" on the whiteboard . Frustrated, she erased it with great force .
So the days continued, with the teacher erasing the word "penis" and the word enlarging each day .
Finally, one day, she walked in, expecting to be greeted by the same word on
the board, but instead, found the words, "The more you rub it, the bigger it
gets!"
