Fun Jokes - Bigger

One day when the teacher walked into the classroom, she noticed
that someone had written the word 'PENIS' (in tiny letters) on the
blackboard.

She scanned the class looking for a guilty face. Finding none, she
rubbed the word off and began class.

The next day, the word 'PENIS' was written on the board again;
this time it was written about halfway across the board. Again she
looked around in vain for the culprit, so she proceeded with the
day's lesson.

Every morning for about a week, she went into the
classroom and found the same disgusting word written on the board,
each day's being larger than the previous one, and each being
rubbed off vigorously.

At the end of the second week, 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."