So this duck walks into a bar, hops up on the bar stool and asks the bartender "got a beer?"

The bartender says "we don't serve your kind here, now get out!"

So the next day the duck comes back and says "can I buy a beer?"

The bartender says "NO!, I told you yesterday that we don't serve your kind here, and if you come back one more time I will staple your feet to this bar!"

The next day the duck comes in and hops up on the stool and says "got any staples?"

The bartender replies "no"

The duck says "then can I have a beer?"