A huge discussion within feminist movements has taken place and continues to take place on the subject, and I cannot do it all justice in a short comment (keywords to research: Sex-positive feminism), but my understanding is that it is best to stick with the idea that women (or any human being really) should be able to choose what they do with their bodies and with their bodies' representations -- the question is the extent of real control women are allowed to have compared to men. I'd say that since you have a general context in society where women are not equal to men and are objectified, it makes it all the more difficult to have a porn creation process that doesn't reinforce this, although exceptions exist in feminist porn.