Why Did the Police Officer Carry a Ruler on Patrol Every Day?
A daily habit turns out to be explained by the most basic thing the object has ever been designed to do.
The Joke
Why did the police officer carry a ruler with him on patrol every single day?
He said he simply liked to keep things straight, no matter what came up.
Witty's Word
A personal habit so perfectly suited to its owner that the explanation hardly needed any further detail.
Explain the Joke
'Keeping things straight' is a common phrase for staying honest, organised, and clear about the facts — qualities often associated with good policing. A ruler's entire purpose is, quite literally, to draw and measure straight lines. The punchline lets the personal philosophy and the everyday tool merge into a single, perfectly measured phrase.
Why People Love This Joke
The joke's neatness comes from how perfectly the explanation fits the object — of all the tools an officer might carry, the ruler is the one for whom 'keeping things straight' could never possibly be just a figure of speech.
Joke Breakdown
The setup poses a question about an unusual daily habit. The punchline 'liked to keep things straight' resolves it by reusing a phrase for honesty and clarity that also happens to describe — completely literally — the one thing the object in his pocket has always been built to do.
When to Use This Joke
Great for police-themed humour, double-meaning lessons, kids' joke books, and any moment a personal philosophy doubles unexpectedly as a literal description of an everyday object's job.