They say that puns are the lowest form of humor, but they are still humor. If you love wordplay, more power to you. But can we go lower? How about a joke that involves the letters of just one word? That would be lower than the lowest form of humor. But that's okay, or just "k," you can still laugh at it. But we can raise the level of that joke by making an entire string of letter jokes that can each be a punch line on its own!
Or maybe not. You have to wonder how someone would tell this joke in text messages. This comic is from J. L. Westover, also known as Mr. Lovenstein.
-via Geeks Are Sexy