Shaun the Prawn was crawling along the bottom of the sea complaining to his his prawn friend Cristian about the nature of the sea world and how great it would be if he were a shark. "Oh it would be great if I was shark", said Shaun. "With a flash of my tail I'd rip through the water and eat anything that moved." "It doesn't sound so great to me actually.", replied Cristian. "Oh it would be great! What are talking about!", cried Shaun. "Well, if you're that keen, you should go and talk to the Cod, he may be able to help you." So Shaun plods along on his scrawny prawny legs and finally gets to the Cod. So he approaches and says, "I really want to be shark, it'd be great. With a flash of my tail I'll scythe through the water and eat divers, and barrels, and just about anything in the water." "Are you sure you want to be a shark?", says the Cod. "Yes, totally, I'd love to be a shark." replies Shaun. "Ok!", says the Cod and with a nod of his head Shaun instantly transforms into an immense white shark.
With a flash of his tail Shaun rips through the water and starts eating anything that moves. Divers, air tanks, empty barrels.
Some time passes and Shaun starts to realise that being a Shark isn't all he thought it would be. He doesn't have many friends, in fact he's already eaten most of them. Shaun decides that he's had enough of being a Shark and goes back to talk to the Cod.
"I'm fed up with being a Shark", said Shaun,"I really regret that you changed me into one. I want to change back".
The cod nods his head in sensitive agreement but says quite sternly, "Well, if I change you back, that's it, you change again, you'll have to remain a prawn."
"Yes, yes, that's fine." said Shaun with an impassioned plea. So the Cod nods his head once again and Shaun is instantly transformed back into a prawn.
Shaun is so excited about this he decides to go and tell his friend Cristian, so he crawls along the sea floor and finally gets to his house, he shouts excitedly for his friend. "Cristian, Cristian, it's me Shaun, I'm back!".
Cristian meanwhile is shaking like a leaf inside his house and says, "You can go away, I'm not going anywhere near you. You're a terrible Shark and you're more than likely going to eat me!".
Shaun is distraught at this and so excitedly shouts back, "No, no, it's ok. Don't worry, it's all Ok now. I've been talking to Cod and he's turned me into a Prawn again, Cristian."
"To love at all is to be vulnerable. Love anything, and your heart will certainly be wrung and possibly broken. If you want to make sure of keeping it intact, you must give your heart to no one. Not even an animal. Wrap it carefully with hobbies and luxuries, avoid all entanglements and keep it safe in the casket of your selfishness. But in the casket - safe, dark, motionless, airless - it will change. It will become unbreakable, impenetrable, irredeemable"
-- C.S. Lewis