The Simpsons...

Like many movies and cartoons and books, The Simpsons is full of metaphors and secret messages... and I love it. One of my favorite things to do when I see a new movie or buy a new album is dig for secrets and "easter eggs." The band Tool, for example, is known for having dozens of secrets hidden within their albums; hidden tracks, special song orders, super quiet messages, and metaphors. Of course the band is generally tight-lipped about any of the fans' theories, so it just makes the whole ordeal expand.
The Simpsons show is no different, most of the stories and characters are based on something from real life and its awesome when we find it out. It seems to me that art, in general, has to have a certain amount of mystery surrounding it for people to take it seriously (or laugh at it).