There was once a man who had two dogs, named Commonsense and Trouble. He always took his dogs to the park every evening.
One day, however, he decided to take only Trouble to the park and left Commonsense at home.
As the man happily played frisbee with his friends, Trouble disappeared. The man became sad and panicky, he looked for his dog everywhere but could not find it.
A lady noticed him and asked: “What are you looking for?” The man replied: “I’m looking for Trouble!”
“Pardon?” asked the lady. The man replied in a higher tone: “I am looking for Trouble!”
The lady was annoyed and asked: “Where’s your commonsense?”
The man answered: “At home.”