A wife dragged her husband into Nasruddin's courtroom.
"He bit my ear!" she shouted.
"You bit your own ear!" the husband shouted back at her.
"Impossible!" the wife replied. "Nobody can bite their own ear."
Nasruddin called for a recess and went into his chambers. He tried to bite his own ear, but only succeeded in falling down and bruising his forehead.
Nasruddin returned to the courtroom. "Check the wife: does she have bruises on her forehead?"
There were no bruises.
"I therefore conclude the wife did not bite her own ear," said Nasruddin. "The husband is guilty as charged."
Inspired by: Mulla's Donkey and Other Friends by Mehdi Nakosteen
Notes: This story is on p. 64 of the book.