'I like Andy Warhol's soup cans, but I won't call them art.'

It is art though. Warhol meant to express in this work and in most of his art his belief that commercial imagery had become the art of our times - for the masses anyway. Sometimes you need that understanding of the artist to gain an insight into the artistic value of the piece.

If everything is art then art is nothing so it's understood that there has to be some rules no matter how contentiously those rules are debated. The same is true about pornography and erotica. There have to be some rules of delineation even if that border proves as difficult to find as this thread has demonstrated.

I find that I lean more toward the position of treatment over subject matter because everything has the right to be the subject matter of art. It all depends on how that subject matter is handled.

'"I can't define it, but I know it when I see it " - The Supreme Court.'

Yup :)