Teacher's Pen

Alright, listen up, you smooth-brained dingus. The joke here is that the teacher used a red pen, and the student used a blue pen. The teacher is marking an "egg" (meaning a big fat zero) on the student's marksheet because the student had no clue how to answer the questions. You know, like how you don't have a clue how to wipe your own butt. Based, I know.