 Chris Westbury's research into what makes words funny is expanding. He confirms that K is indeed inherently funny, and he's finding more letter combinations that bring out the giggles. Words that have certain phonemes in them are also funny, and it happens that both P-L-E words, words that end in P-L-E, in fact, any consonant L-E, and words that have O-O in them are judged funnier. And what word includes P-L-E as well as O-O and K?