Iva Sallay, of the Find The Factors blog/recreational puzzle, had an outside-the-box suggestion for my Fall 2018 A-to-Z essays. It was some great thinking, though. There are a lot of mathematical jokes out there. They represent different aspects of humor writing. I had a great time exploring some of these different kinds. Is it truly mathematical? I don’t know. I loved writing the essay, though, and I keep enjoying re-reading it.