A duck walks into a bar, says 'Give us a fish'
The Barman replies "No, this is a pub. We don't sell fish"
Few hours later, the duck returns. "'Give us a fish'
The Barman replies "No. This is a pub. We sell lager, we sell peanuts, and crisps. We don't have any fish"
Few hours later, the duck returns..."'Give us a fish'
The Barman, now somewhat annoyed, replies "NO! I told you, we don't have any bloody fish! And if you ask me again, i'll nail your beak to the bar!"
Few weeks later, the duck returns to the bar, and asks "Got any nails?". the barman replies "no". the duck says......."then give us a fish!"