Some day, when I have a data base, web space, time, and I've googled to makes sure no one else has done this already, I'm going to start a list of all the jokes in the world. I curious about how many unique jokes there are. I'll probably group them by punch line because there are a lot of variations on the same joke, but the punch line is the same. For example, the one about throwing the lawyer out the window, I've heard at least 2 versions of that joke. I'd store all the variations, but they'd only count as one joke. I'd also group the jokes by topic.
Current favorite joke: I was wondering why the flying disk kept getting larger and larger. Then it hit me.