I think most people can tell the difference between right and wrong, good and evil. The idea that what is porn to one, isn't porn to another so popular the last few years sounds like an excuse to me to promote pornography. I am not accusing you of that before you get upset, you didn't coin that phrase of course! I know I know the difference anyway, and think most do. JMO.
Catechism of the Catholic Church, 2354:
2354 Pornography consists in removing real or simulated sexual acts from the intimacy of the partners, in order to display them deliberately to third parties. It offends against chastity because it perverts the conjugal act, the intimate giving of spouses to each other. It does grave injury to the dignity of its participants (actors, vendors, the public), since each one becomes an object of base pleasure and illicit profit for others. It immerses all who are involved in the illusion of a fantasy world. It is a grave offense. Civil authorities should prevent the production and distribution of pornographic materials.
This is surely what Archbishop Chaput is speaking of. He is, in fact, a theologian.
See #98.
The fact is that there are people here who consider the entire Dutch Baroque era and Michelangelo's David to be "pornography" and there are (probably) a few here that believe that Penthouse, Hustler, etc. are not immoral.
Don't get me wrong--I'm opposed to smut. What I'm saying is that we need to define what it is, and that's half the battle.
Why?
"Pornography" is largely subjective and taken by the individual. For example, I personally don't find naked paintings from the 17th century to be obscene, but I do find most nudie media as being obscene. It's entirely possible you might have a completely different idea as to what's acceptable.
Of course, this isn't to say that there is some guidance (IMHO, Scripture and Pope John Paul II's Theology of the Body are excellent). Those can, and I believe will prove invaluable in trying to define "pornography."
As just a single example in a sea, is the Kama Sutra pornography ?