Let's get one thing clear, American Psycho is a comedy - that needs to be understood before you read it. It's a comedy about yuppies, and how empty-headed and essentially shallow they are, about how far too much money coupled with far too little imagination can cause you to begin to shrink your world, until you live in such a self indulgent cocoon, you cannot even spot the raving, murdering lunatic in your midst. That is effectively what Easton-Ellis is telling us - yes, Yuppies are THAT shallow.