Once there lived a zebra and some twin bunnies. Zebra was heading towards the home of the twin bunnies carrying a ball. A little later, one bunny took the ball from zebra and she would only play with the ball by herself. She said, "This is mine. mine alone!" Then, zebra told bunny that it was better to share. If you take something that is not yours, you have to return it sooner or later. 
It is better to share than to hoard stuff for yourself. 