The closest thing to a joke that I've ever made up was this:

(Preface: This was soon after Paul Reubens—a.k.a. Pee Wee Herman—was arrested for "indecent exposure"—actually masturbating, I think—in a porn theater.)

"If they're going to prosecute him for that, they ought to prosecute everyone who goes to a concert and hums along with the music."

I didn't really intend to make up a joke, but a few friends who heard it laughed so hard I began to think of it a joke. One even asked me months later, "What was it you said about Pee Wee Herman?" (Maybe you had to be there.)

My real intention was to explain why I thought the law was unjust. Laws against "indecent exposure" are intended to protect "innocent" people from being offended by things they see. But who were the innocent offended parties in this case? The people who paid to see something even more indecent than what Pee Wee was doing? I simply thought of the best analogy I could, and I was rather surprised that people found it so funny.

Yet my remark doesn't fit Marion's definition of a joke because it has no narrative. It depends on people having heard the narrative portion—the news story—already. But I wonder if you could turn it into a joke? "A guy goes into a porn theater…" I don't think I have the imagination to do it myself, but anyone else who wants to try, be my guest.