I've been thinking about this question on and off for years. As I've said more than once in other threads, I consider the "beautiful woman" one of the great proofs of God's existence.
But I also know that some of the things I've considered "beautiful" others would consider "p*rnographic depiction." (Indeed, the paranoid part of me is very hesitant to even admit that I've looked at a single p*rnographic picture for fear that it might get me an unwanted kind of attention by state and employer. I live in a small town and I work for a PC employer.)
I'll always remember Supreme Court Justice Potter Stewart's response when asked to define obscenity: something like "I can't define it, but I know it when I see it."
Now there are some things in the p*rn universe that disgust me and make me want to puke and pull out a castrating knife for those creating it and enjoying it: stuff involving 10 year old children, animals, defecation, and worse.
But there's other stuff that, to me, goes in the column of "beauty."
Yes, I know, there's a difference between "beauty" and "sexually arousing." Not all beauty yields a hard on (sunsets, for example, or a babbling brook, or Ingrid Bergman in Casablanca). But that seems to me a false distinction: cannot a picture of Jessica Biel's face lead one to say either "she's beautiful" or "those lips make me think of ...." Or both.
Maybe what I'm asking is this: when does presentation/appreciation of beauty cross the line into pornography?
(Kevin: feel free to relocate this post to the back alley if you think it should go there.)
And do not be conformed to this world, but be transformed by the renewing of your mind, that you may prove what is that good and acceptable and perfect will of God.
Romans 12:2 (NKJV)