Because it amuses us, Clinton, why else? It isn't a be all, end all thing. But we humans love to make lists of our favorite things, and see what other peoples' list of their favorite things looks like compared to ours.

Not terribly complex, now is it?

I mean, here is the About.com Top 100 Pop Hits list which is a fan voting list. It puts "Satisfaction" at #1 and "Like a Rolling Stone" at #21 I think it is--and "What's Goin' On" behind that.

Of course the lists are arbitrary and capricious, that is the point. Which is why Rolling Stone keeps putting the "Greatest" list issues out.

Now, how is it that Motown isn't represented in the top 20? Surely there must be a Motown song that would qualify as a zeitgeist sort of song...