You want to hear a dirty joke? Jonny played in the mud. You want to hear a clean joke? Jonny took a bath with bubbles. You want to hear a dirty joke? Bubbles was the next door neighbor.
The Dirty Joke With Bubbles
Categories
Explanation
Experiment
The joke plays on the double meaning of "dirty". The first two parts set up the expectation that 'dirty' refers to physical dirt, but the punchline subverts this by implying a sexual innuendo with 'Bubbles' being the neighbor, suggesting an affair. The humor comes from the unexpected shift in meaning.