Ok. I did I little research and found this article. Here are a few exceprts.
"one crucial question about pornography and violence concerns the conditions under which the women work in pornography. There is evidence that force and coercion are sometimes used to secure women's participation ( Lovelace, 1980, 1986),"
"As pornography has become more acceptable, both legally and culturally, the level of brutality toward, and degradation of, women has intensified ( Jensen, 2004). As one pornography director put it, "People just want it harder, harder, and harder...what are you gonna do next?" ( Adult Video News, 2003, p. 60). Another director was blunt in describing his task: "[O]ne of the things about today's porn and the extreme market, the gonzo market, so many fans want to see so much more extreme stuff that I'm always trying to figure out ways to do something different. But it seems everybody wants to see a girl doing a d.p. (double penetration) now or a gangbang. For certain girls, that's great, and I like to see that for certain people, but a lot of fans are becoming a lot more demanding about wanting to see the more extreme stuff. It's definitely brought porn somewhere, but I don't know where it's headed from there" (p. 46)."
It's fairly well known as well that some women do pornographic films for money simply because they have a drug/alcohol addiction of some sort, just like prostitution. How can you argue prostitution doesn't increase STD's? The same women sleep with different guys everynight for money of course they get STD's and it spreads. I will find a statistic for you in a minute. Here's another.
"( MacKinnon & Dworkin, 1997), my interviews with pornography users and sex offenders, and various other researchers' work, have led me to conclude that pornography can: (1) be an important factor in shaping a male-dominant view of sexuality; (2) be used to initiate victims and break down their resistance to unwanted sexual activity; (3) contribute to a user's difficulty in separating sexual fantasy and reality; and (4) provide a training manual for abusers"
It can clearly be proven Jam. Pornography messes people up. Again:
"And from three different men in my study who had been convicted of sex offenses ( Dines, Jensen, & Russo, 1998):
From a 34-year-old man who had ***** women and sexually abused girls: "There was a lot of oral sex that I wanted her to perform on me. There were, like, ways that would entice it in the movies, and I tried to use that on her, and it wouldn't work. Sometimes I'd get frustrated, and that's when I started hitting her. ...I used a lot of force, a lot of direct demands, that in the movies women would just cooperate. And I would demand stuff from her. And if she didn't, I'd start slapping her around"
Now this clearly does not prove to an end that porn increases violence or degredation of women or whatever but it is an example and shows that it's definately true. Of course not all people are affected in this way but enough are to the point where you can Google something about it and you'll find a plethora of articles, research done, interviews etc.