Laughter 101

Comedy is not a science; it's an art.  And, as with any other skill, it can be practiced and perfected.  Humor is also subjective.  A person's sense of humor can change over time.  For example, when I first heard What Does The Fox Say? I stared at my computer screen with the video on repeat, unable to stop laughing.  Now whenever I hear it it's all I can do not to roll my eyes.  To keep the laughter fresh, you need to follow the Rules of Humor.