More Jewish humour

A Pole, and Italian, and a Jew, all first-time fathers, are pacing
nervously in the maternity ward waiting room when a nurse rushes out of
the delivery room holding a black baby.
"Is it yours?" she asks the Italian."Certainly not," he retorts.
"Yours?" she asks the Pole, who vigorously denies paternity.
"How about you?" she asks the Jew.
"Maybe," he says glumly. "My wife burns everything."