Teenage girls can be cruel.
This janitor experienced that cruelty first-hand when the "popular girls" in his school kept leaving lipstick prints on the bathroom mirror. So he taught them a lesson they'll NEVER forget!
He called a meeting with all of the most popular girls on campus. He wanted to show them EXACTLY how he takes those lipstick stains off of the mirrors. It took so much time, he couldn't even see his family!
They are STUNNED!