I'm not sure that porn needs to be 'exploitational' of sexuality. Any more than photos of sunset are exploitative of the sun. People can be exploited, by being "forced" to do things they would never normally do, but I'm not sure that a concept can be exploited.
Now, objectification is a different matter - but not one I believe is inherently evil. We objectify politicians every time we think of them as objects of politics rather than people. We objectify salesmen when we forget that they have attributes separate to their selling powers. We objectify all people when we view them as having only one purpose. The problem comes when we objectify people who are not wanting to be seen in that way. To sexually objectify a person who is deliberately displaying themselves for sexual reasons isn't a bad thing, in my view. To sexually objectify a co-worker who is there to change the toner/do the accounting/design the aircraft is a completely different matter.
(originally posted in a comment thread elsewhere, thought it deserved a wider airing so more people could poke holes in it)
Finished it. Was the best one so far, her writing style has improved vastly as she's made the transition from good short book (Azkaban) via rather padded longer books (Goblet and Phoenix) to good long book.
I managed to completely avoid spoilers for 5 days before today. And then, with 60 pages to go, I was walking past a bunch of chavs on the way home, one of whom saw what I was reading and shouted "Massive Spoiler" at me. Fortunately the ending still worked for me, and although I didn't cry it was rather moving.