🔤 Wordplay

Why did the dad bring a ruler to bed?

To see how long he slept!

Why This Joke Works

"How long" refers to the duration of sleep, but a ruler measures physical length. The dad uses the wrong instrument for the right question, substituting measurement units in a way that is perfectly logical and completely useless.

🎤 How to Tell This Joke

Present the ruler idea with genuine earnestness, like it's a sensible sleep-tracking strategy nobody else has thought of yet — the sincere problem-solving energy makes it funnier.

Perfect for:

  • Father's Day morning when dad is bragging about how long he slept in
  • When a kid gives dad a ruler as a gift and dad immediately sees the opportunity
  • During any conversation about sleep tracking or getting enough rest

💡 Did You Know?

Father's Day was made a national holiday in 1972, but dads have been telling bad jokes since the dawn of fatherhood itself.

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