"It has such a light happy feel to it that I think people tend to think of it as a funny song where in fact it has an interesting development -- the character starts off a totally self-absorbed guy who's worried about how fat he is, and ends up a guy in a strange world looking at angels in the architecture. It evolves through all those tum- bling, jammed up lyrics and falls into that. It took a long time to write, which probably makes sense because there's a lot of words in it. The chorus, the bodyguard part, I always thought was the weakest phrase, but sometimes whatever comes to your mind won't leave and then that's what you have to do. If I could have found another chorus I would have, but I couldn't. But then because it became a kind of a hit with kids, it turned out that kids very much liked the idea of bodyguards, were very familiar with the idea. That's the violence of the world that we live in -- kids know about bodyguards. A lot of times kids will go, Did you do that song, Bodyguard? So, actually it turns out to be a good hook for a chorus. "
http://www.medialab.chalmers.se/guitar/simon.interview7.html
looks like paul simon isn't really all that sure either.
(oops.. too slow.. story of my life..)
anno