A Donkey And The Load of Salt
Once there was a salt merchant. He had a donkey. He carried salt on it from village to village. One day they were crossing a river. All of an explosive the donkey slipped and fell down. When the donkey got up, it found the bag light. Now the donkey found the trick. It sat down in the stream every time it crossed it. The merchant wanted to teach it a lesson. Next day time unit places a bag of the compass it’s back. It sat down in the same way. When it got up, it found the load very heavy. Now it gave up its habit.
Moral: Tit for tat.