Duck walked into a pub and said "Can I have fish and chips?"
Landlord says "this is a pub, not a chip shop", and the duck leaves.
The next day, the duck comes back in and says "Can I have fish and chips?"
Again, the Landlord says "this is a pub, not a chip shop", and the duck leaves.
The next day, the duck comes back in and says "Can I have fish and chips?"
This time the landlord is really cross and says "I've already told you no, if you ask for fish and chips again, I will nail your beak to the bar!" The duck leaves.
The next day, the duck comes in and says "Do you have any nails?". The landlord says no. The duck says "OK, can I have some fish and chips?"