From Vanity Fair, 1918 (via the winsome Jonathan Caws-Elwitt):

Archibald Marshall's Upsidonia (1918) is dedicated to the three funniest letters in the alphabet: K, M and N.

Punch lines themselves are funny, claimed Ludlow Porch.  "If the punch line is good enough, you don't even need to know the joke.  When you hear a good punch line, only two things can happen: Either you laugh because it is funny even without the joke, or the punch line reminds you of the joke and you still laugh" (Who Cares About Apathy?). 

So what makes the joke book Count Draculations by Charles Keller so extraordinarily charming is how illustrator Edward Frascino approached the project.  It's as if Frascino had been given a list of jokes but not punch lines.  His profuse illustrations never take any one joke literally but rather depict punch lines to wholly different jokes that aren't otherwise in the book.  Either he made up his own answers to the set-ups, or he illustrated better answers; either way, it's gold.  True to Ludlow Porch's philosophy, Frascino's isolated punch lines are funny in themselves, and they invite the viewer to come up with the missing jokes.  The illustrations in this book do not complement the printed jokes but rather offer a subtler (and superior) joke book within the joke book.

From Captain Billy's Whiz Bang, Oct. 1921.

From Speaking of Funny: 77 Ways to Add Humor to Any Presentation by David Glickman, 2017.

[As a bonus, this item overlaps our "Which is Funnier" and "Not Rocket Science" departments.)

Which is funnier: "mustard and cheese" or "cheese and mustard"?

As we told literary scalawag Johnathan Caws-Elwitt, we'd go with "Mustard and Cheese" over "Cheese and Mustard."  To our ear and imagination, the two syllables of mustard at the end are like two legs to stand on -- there's stability there.  We see a cube of cheese sitting atop a wide jar of mustard -- it's a firm situation, like a food pyramid.  But the two syllables of mustard atop a single-syllabled cheese cube -- it's teetering before we can even type it out!  The pyramid is upside down.  It might even be spinning on its tip as it teeters.  To those who would imagine cheese slices securely bonded with mustard mortar, we can say but this: "If only you could see what we see."  Mustard & Cheese: the Morecambe & Wise of the deli.

Our image is from Lehigh's 1916 yearbook.  

From Unusual Questions Leader Guide by Adam Thomas, 2014.

Who is funnier: Robin Williams or Jerry Falwell?

Clue: This is according to Bill O'Reilly.

Answer: "Robin Williams is far funnier than Jerry Falwell." (The answer is in black text on the black background. Highlight it to view.)

Citation: Bill O'Reilly, Culture Warrior