What the *beep*

This has got to be one of the most fascinating films I've ever seen, but has anyone been able to figure out what message it is trying to convey? Normally I don't assume that the lead characters of any film are intended to act as lofty moral examples to the audience, nor do I assume that every film has a message, but the characters engage in more "moralizing" than in any Biblical epic I've ever seen. Unless the director deliberately set out to offend everyone (with the possible exception of crazed homophobic Satanists), I just don't know what to make of this movie! The only thing that has ever left me feeling this dumbfounded are Michael Jackson videos.