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A woman comes into a bank with her son in her arms. The boy is only two years old. He's eating a cake. When the woman comes to one of the windows, the boy watches the teller carefully. Then he gives his cake to the teller. The teller smiles and shakes his head.

"Oh, no, my dear. Don't do that. We aren't in the zoo, " his mother says. Then she says to the teller, "I'm sorry. Please forgive my son. He has just been to the zoo. "