An Englishman an Irishman and a Scotsman are wandering about in the jungle, but they get captured by a vicous cannibalistic tribe!!! The chief tells them that if they can show 20 inches of willy between them, he'll let them go!!
The Englishman shows 10 inches of willy, the Irishman shows 9 inches of willy, and the Scotsman shows just 1 inch!! Phew that's enough for the 20 inches they need!!
The chief free's them and as they walk away the Scotsman says "It's a good job I had a hard on!!"