I can't remember where it came from, but can anyone reference the study that suggested that about 75% of prostitutes and porn actors come from a background of child abuse, drug addiction and human trafficking.
How do you tell that the one you're using is one of the 25% who doesn't?
Also, I used to accept the idea that some men were after companionship, intimacy and sexual relief without seeing the women they were paying for those services as lesser. These days I am far less persuaded by that argument.
If your life is such that you have no companionship from anyone, maybe you need to change your life. Maybe if you're that socially inept that money you'd spend on sex would be better spent on counselling and social skills courses.
There is no such thing as intimacy in a paid transaction. Again, it would be far better to try to change yourself and your life to achieve it for real.
It's not that hard to get NSA sex, and plenty of ordinary people, fat, short, bald, spotty, disabled, people etc etc manage to have relationships or have NSA sex. If you have to pay for it maybe it's because you're not looking for it in the right way or you've got major personality shortcomings that you should work on.
If your sexual proclivities are such that most people wouldn't do it, join a fetish club for like-minded people. There is nothing out there that hasn't been done before. You're unlikely to be alone in wanting to be spanked/wear a nappy/have anal/whatever.
If you still can't find what you're looking for without paying for it, perhaps consider the possibility that no one in their right mind would willingly do that without a cash incentive. Should that not tell you something?