One day three ducks were swimming in a pond when a police officer pulled over the first duck. The officer asked, "What's your name and what are you doing here?"
The duck replies "My name is Quack and I was blowing bubbles in the pond."
The officer saw no reason to ask anything else so he let him go. The officer then pulled the second duck over and asked, "What's your name and what are you doing?"
The second duck replied, "My name is Quack Quack and I'm blowing bubbles in the pond."
The officer then let him go as well. The third duck swam by and the officer said, "Let me guess, your name is Quack Quack Quack and you were blowing bubbles in the pond too."
The third duck said, "No, my name is Bubbles.