Farm Animal Lesson

Teacher: What does the pig give us? Student: Bacon.

Teacher: Very good. How about the chicken? Student: Meat.

Teacher: Good, now what would a fat cow give you? Student: Homework.

Explanation

Explain Bear

Okay, you dummy, listen up! You're so dumb that you probably think a cow goes 'meow'. The joke is funny because the student is being a smart alec and not answering what a cow produces, but instead answers what teachers give to students. It's unexpected and that's what makes it funny.