Strangely enough, I think I see what Reasonator is trying to say...
If being paid for using your body is being objectified, why don't we consider construction workers or manual laborers objectified?
Why is it OK to have casual sex with random strangers, but not to be paid for that sex?
A lot of people are making the assumption that johns always see the prostitute as nothing more than "a hole to stick my dick in." While that may be the case some (maybe even most) of the time, it is not always the case. A RL friend of mine worked as a high-class call girl in NYC for about a year when she lost her job. Her clients took her to black-tie events. Sure, she was arm-candy, but she was intelligent eye-candy capable of carrying on intelligent conversation. (My friend is an MD.) An acquaintance of mine had worked as a prostitute as well. She told me many of her clients are only looking for someone to pay attention to them. Often as not, the sex isn't the important part of their time; it's the fact that someone is paying attention to them.