The honest answer is "I don't know." I cannot really say that I am sufficiently free of social conditioning about sex to say that it is or it isn't. I have had the opportunity to trade sex for money a few times in my life, and it never felt right and I didn't do it. My reasons for refusing had nothing to do with being called a slut - they had more to do with my being unable to dissociate myself from my own subjective sexuality so as to serve as a conduit for someone else. For the same reason, I don't even think I could function as a sexual surrogate, for example.
Right now, it seems that there are very few connections left between people: friendship, familial connections, and sexual connections (including or not including love). I have a problem with prostitution because though it takes the form of a sexual connection, it is not a sexual connection. In my mind sex involves two free people. Call me crazy. I have the same problem with alienated wage labor, but we weren't talking about wage labor. The thread originated with an assertion that the left was anti-sex, and it devolved into the more precise assertion that I was one of these left pc prudes because I would not agree that porn and prostitution were liberating.
I still don't.
Joanna