A man decides he wants to have a pig roast, so he goes out to a pig farm to buy one. He agrees on a per pound price with the farmer and then begins to select a pig. How about that one?

OK, replies the farmer. The farmer then picks up the pig, puts it`s tail in his mouth, lets it hang from his mouth and then declares, This one weighs 74 pounds.

That`s amazing, the man says, Are you sure you can tell a pigs` weight by using that method?

Yep, says the farmer, we`ve used this method in our family for generations. To prove his accuracy, the farmer puts the pig on a scale and it weighs exactly 74 pounds.

My son can do it, too, boasts the farmer. Sure enough, the farmer's son comes over, puts another pigs` tail in his mouth, lets it hang and then says, This one weighs 83 pounds. The farmer then confirms his sons` accuracy with the scale.

My wife can do it, too, says the farmer. Son, go get your mother.

The boy runs off to the house and returns a few minutes later. Mom can`t come out right now, says the son. She`s busy weighing the mailman.