There was once a fox, which was very friendly with a stork. It invited the stork to dinner one day and decided to play a prank. So he set the table with a shallow dish, with little soup in it. The fox had a good meal, while the stork had a tough time drinking the soup with its long beak. The stork decided to return the kindness and invited the fox over for dinner and served soup in a long-necked, narrow-mouthed jar. This time the stork ate well, and the fox starved.
Moral: One bad turn deserves another.
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From @clemmycool