The teacher walks into the class…

As she walks in is written on the board “Johnny has a huge penis”, she erase the board, and proceed class.

In the next day as she walk in, is written again in the board, “Johnny has a huge penis”, she them looks at the class and asks who wrote that, but no one answers. She then erase and start class.

Next day same thing, “Johnny has a huge penis” written on the board, she them goes mad, looks at Johnny and yells “I will speak with you after class young man!”

In the next day as she enter the class, written even bigger in the board is “Marketing is the key of success!”

Edit: fuck up a word.