A friend once told me that puns were the lowest form of humor. It was just after I’d told him one. I think he’s wrong, and apparently I’m right because C.S. Lewis has identified the worst of humor – or as his protagonist the senior devil Screwtape puts it:
Flippancy is the best of all. … It is a thousand miles away from joy; it deadens, instead of sharpening, the intellect; and it excites no affection between those who practice it.
C.S. Lewis, The Screwtape Letters