Keeping the porcupine warm
It was the coldest winter ever. Many animals died because of the cold. The porcupines, realising the situation, decided to group together to keep themselves warm. But the quills of each one wounded their closest companions.
After a while, they decided to distance themselves one from the other but they began to die, alone and frozen. So they had to make a choice - either accept the quills of their companions or leave the world once and for all. Wisely, they decided to go back to being together.
Thus they learned to live with the little wounds caused by the close relationship with their companions in order to receive the warmth and heat that came from the others. This way they were all able to survive.