(We are just starting to study economics in class. The assignment is to choose six of seven basic vocabulary terms, and to draw a stick figure sketch of each.)

Student #1: “I don’t get this one; what is a production possibilities frontier?”

Me: “It’s a graph. It shows how much of any two items somebody could make, given their available resources.”

Student #1: “Oh, good. [Student #2] thought it was something else.”

Me: “What were they going to draw?”

Student #1: “A pregnant woman.”

Me: “…”