A little boy was doing his math homework. He said to himself, "Two plus five, that son of a bitch is seven. Three plus six, that son of a bitch is nine."
One day when the teacher walked to the black board, she noticed someone had written the word 'penis' in tiny letters.
A linguistics professor was lecturing his class.
A little girl was talking to her teacher about whales. The teacher said it was physically impossible for a whale to swallow a human because even though a whale is a very large mammal, its throat is very small.
Use of the word "beautiful".