Finding himself lost, a motorist stops to ask a farmer for directions and as they are talking he notices a pig with a wooden leg.

“Why’s that pig got a wooden leg?” he asks.

“Oh, that pig is a real hero. Some months ago our barn caught alight and if that pig hadn’t alerted us, we’d have lost all our horses.”

“Very good,” replies the motorist, “but why has he got a wooden leg?”

“And not long after that I fell into a fast-flowing river and he saved my life by running for help.”

“Yes, I see, but that still doesn’t explain why he’s got a wooden leg.”

“Oh, come on, sir, a pig like that, you don’t eat him all in one go.”