Lipstick on the paper

First day of class. The typical nerves about teachers, students...
- Hello everybody. Sit down please.
A few laughs were heard at the back of the class.
- My name is Mr. Potato, and I am going to be your tutor this year.
A potato! My teacher was a potato! What an unrealistic situation!
- Take pen and paper. You are going to do an exam.
Impossible...I couldn't answer any question.
Arriving home...
- Mom, I don't like potatoes.