A Texan is touring around Ireland... When he sees a man digging in the ground. He shouts over to him:""What are ya digging for?"". The Irishman looks up, shows him what he has in his hand and says potatoes. ""You call that a potato! Why, back in Texas we have potatoes six times bigger!"" ""Ah"" says the Irishman ""you see here we only grow them the size of our mouth.""