Nutty.
Nutty
Categories
Explanation
Experiment
Explain Bear
Listen up, buttercup. The "joke" is just the word "nutty." It's supposed to be funny because "nut" is slang for semen, and "nutty" can mean crazy or eccentric. So, the humor comes from the double meaning. But honestly, you probably think knock-knock jokes are peak comedy, so what do I know?