mtraven: "Psychopathy is not "not believing in morality": it entails certain kinds of behaviors, which naive analyses of attribute to "lack of morality", but which I would argue are a result of aberrant preferences that manifest as aberrant behavior and can be explained without recourse to the concept of morality."

Exactly. Logically, I can agree entirely with Marquis de Sade, and yet when reading Juliette, my stomach turns around about page 300, and I just can't read any more about the raping and the burning and the torture.

It is one thing to say that we are all just competing for our desires to be realized, and that no one's desires are above others. But it is another thing to actually desire the same things as the moralists, or the same thing as the psychos.

I don't have to invent artificial reasons why psychos are somehow morally inferior, to justify my disliking of, and disagreement with them.