woodpecker

A Mexican woodpecker and a Canadian woodpecker were in Mexico 

arguing about which country had the toughest trees. The Mexican 

woodpecker claimed Mexico had a tree that no woodpecker could  peck.

The Canadian woodpecker accepted his challenge and promptly pecked a hole in the tree with no problem.

The Mexican woodpecker was  amazed.

The Canadian woodpecker then challenged the Mexican woodpecker to  peck a tree in Canada that was absolutely 'impeckable' (a term frequently used by woodpeckers ). The Mexican woodpecker expressed confidence that he could do it and accepted the challenge.

The two flew to Canada where the Mexican  woodpecker successfully

pecked the so-called 'impeckable' tree  almost without breaking a sweat.

 Both woodpeckers were now terribly confused.

How is it that the Canadian woodpecker was able to peck the Mexican

tree, and the Mexican woodpecker was able to peck the Canadian tree,

yet neither was able to peck the tree in their own country?

After much woodpecker pondering,

they both came to the same conclusion:  Apparently, your pecker gets

harder when you're away from home.