I don't think perversion exists as an objective concept, only as a relative value judgment and a sociological phenomenon. See the definition: "the alteration of something from its original course, meaning, or state to a distortion or corruption of what was first intended." The key part, of course, is the "first intent." What is the first intent? What is the intent of this forum's existence? You can't tell me it's to discuss typology, because that's just something you came up with, and (barring consequences), I can just as easily ignore it and post some animal porn or pictures of murdered children all over the place. Of course, this would lead me to become banned and an outcast, but you can't in good conscience point to me and say "you're a pervert!" and justify it logically. You can't even say I'm a horrible person because someone might just disagree with you. What you can say however, is that I'm harming the order of this constructed, artifically-directed (in terms of its "first intent") environment and breaking the rules, and thus, "perversion" becomes something little more than "what the laws frown upon".