thats a good one!, A duck walks into a post office and asks the man behind the counter 'do you have any corn?' The man answers politely 'No, we don't have any corn here.' The next day, the duck enters again and asks 'Do you have any corn?' Annoyed, the man answer 'No! We don't have any corn.' This goes on for a couple of days until finally, when the duck asks 'Do you have any corn?', the man gets so upset he yells 'NO! For the last time we don't have any corn, and if you ask again I'll nail your beak to the counter!' The next day, the duck returns and asks 'Do you have any nails?' The man answers 'No.' Then the duck asks 'Do you have any corn?' lool