One of the lesser known reasons though, is that it exposes you to some truly awesome music from somewhere you didn't expect. If I had to construct a rigid philosophical framework, I think this would be a major tenet. You might be asking, "What is that unexpected source, Martin?"
Here's the rundown: Buffy Sainte-Marie is talking to Big Bird about some of their interpersonal problems. Big Bird, of course, is suffering unshakable angst, so Buffy is forced to crack it in typical Sesame Street fashion. The music starts at 2:05, by the way.