Tit for Tat

Once upon a time in a dense forest, there lived lot of animals. The animals lived in friendship. A fox came to the forest for the first time. The animals didn't like the fox and so they neither made friendship nor talked with it. Once, the fox went to lake for water and saw a crane trying to catch fish. It initiated a sweet talk with the crane and invited to its house for dinner. The fox's idea is to gain confidence of the crane and make friendship with other animals with its help. The crane which got duped with the fox's sweet talk, went to its house for dinner on one fine day. Even though the fox invited the crane for dinner, it was reluctant to serve food to the crane.  Hence, it served the delicious food on 2 plates and placed one of the plate before the crane. Due to its long beak, the crane could not eat the food from the plate. The fox ate the food happily. Having understood the fox intention, the crane said, "I liked your hospitality a lot. Tomorrow, do come to my home for dinner".
  Next day, the fox went to the cranes house. "I went to the lake early in the morning and get some fish. I cooked delicious fish soup for you. You will never forget the taste of it, in your life" said the crane and poured the soup in a jar with a narrow neck. It offered one of the jar to the fox. As the fox could not insert its mouth in the jar, it failed to eat the delicious soup. On the other hand, the crane happily took the fish one by one, praised the taste and ate happily. Even thought the fox was hungry, as it could not eat the soup. It said, "I am not hungry" and started to return. On seeing that the crane said, "This is called tit for tat" and laughed at it.