There were some points I wanted to make about porn, but can't remember them all. I'll try, though.
I have been professionally involved in the porn industry and used to watch porn. I used to think that women could be making a positive choice to be involved in porn and were very well paid for doing it. I don't think that now. I don't think it is a choice that is made in a vacuum, it is born out of society's attitude to women and I no longer think it can be anything other than exploitative. The type of coercion that has been discussed about men pushing women to do sexual things they don't want to do (pestering, emotional blackmail, getting them drunk, making them feel uncomfortable, making them feel they have to etc up to threats, violence and force) is also used in the porn industry by men who are very skilled at it and do it for a living. Maybe some women are making a completely freely consenting choice about the actions they are taking in photos and on screen (I have my doubts) but I don't see how I, as a consumer, can tell if the woman I am watching is in that position or of I'm watching a sexual assault. So I no longer feel comfortable about watching it.
Instead, I now consume erotic fiction. It's all words, it's all made up, no one is being abused in front of me. But very often very violent acts/forced anal/rape/the woman being verbally abused appear suddenly without warning. So while no one has been abused in the making of it I wonder if it could encourage abuse, as in the comment earlier on about women turning up with injuries consistent with acts that are popular in porn.
There's also the issue of the "violent sex" defence, where men who have killed women claim that the woman consented to strangulation during sex and they were just so carried away in the moment that they didn't realise they were actually killing her.