A duck waddles into a grocery store and asks the clerk, ?Do you have any duck food??

?No, we don?t have duck food and we don?t serve ducks. This is a grocery store. Get out of here.?

The next morning the duck waddles into the same grocery store and again asks the same clerk, ?Do you have any duck food??

The clerk, speaking slowly and distinctly, says, ?NO! I told you yesterday that we don?t have duck food and we don?t serve ducks. Get out of my store and don?t come back!?

The next morning, sure enough, the duck enters the same grocery store and once again asks the clerk, ?Do you have any duck food??

The clerk screams, ?NO! WE DON?T AND IF YOU COME IN HERE ASKING FOR DUCK FOOD ONE MORE TIME I?M GOING TO NAIL YOUR LITTLE WEBBED FEET TO THE FLOOR!?

The next morning the duck enters the grocery store and asks the clerk, ?Do you have any nails??

Amazed, the clerk says, ?No, we?re a grocery store; we don?t carry nails.

?Good,? says the duck. ?Do you have any duck food??