A duck walks into a store…
He shouts at the proprietor, “Hey! Got any duck food?”
The store proprietor answers, “No, we don’t.”
The next day, the duck returns, and asks, “Hey! Got any duck food?”
The store proprietor says, “I told you yesterday, we don’t have any duck food. Now please leave.”
The next day, the duck return, and asks, “Hey! Got any duck food?”
The store proprietor says, “For the last time, we don’t have any duck food! And if you come back here and ask again, I’m gonna nail your feet to the floor!”
The next day, the duck returns, and asks, “Hey! Got any nails?”
The store proprietor answers, “No, we don’t.”
The duck replies, “Good! Got any duck food?”