There's a hotline straight from the eyeballs to the testicles, and becoming a Christian doesn't seem to shut it down. I'd have to confess to having had very little experience of being a woman, but I have been a guy for a while, and I know that eyeball sex can be a pretty powerful thing. Sexual feelings without any relationship. Sex without love without interaction, without communication, without intimacy, without giving. It's lousy sex.
Page space is limited, so here's just one thought on the topic.
Porn is people. They are real pictures of real people, doing real things in front of a camera. You don't know them, they're Americans or Asians or Eastern Europeans, but they are people. You're only looking at their skin, but they have hearts and souls, and Jesus loves them. Even if you are just browsing the free preview sites on the Net, those people were paid money to have sex so you could watch.