A panda goes to see a hooker. He goes down on her, he mates with her, he ejaculates and then he attempts to walk away.
The working girl asks, "Aren't you going to pay me?"
She opens the dictionary to "Prostitute: One who sells sexual companionship for money."
The panda picks up the dictionary and turns to the definition "Panda: A marsupial who eats, roots, shoots, and leaves."