Humor is like the brain running on a treadmill, because in order to enjoy humor you need to comprehend it. We all know that if you don't "get" a joke, it's not funny, but often times we find ourselves ten minutes later laughing hysterically because we've figured it out, and even though ten minutes is kind of a long time to understand a joke, your brain was working it's tail off trying to comprehend what was just said. It's funny, isn't it? (see what I did there?)