I think I wouldn't mind dentists so much if they didn't involve the fusion of two things I dislike: pain and paying money. If, for example, they PAID me money to go to the dentist, then that wouldn't be as bad. I don't always want to go to work, but that's why they pay me--to make sure I go anyway. And then again, if I paid money and got something I enjoyed in return, that would be fine, too. That's what paying money's all about: getting stuff you want to get. But somehow, Dentists have become convinced that we want to get pain badly enough that we'll pay them to dole it out. And we encourage this notion by actually doing it.
Of course, maybe it's because if I don't pay for this kind of pain, then I'll get even worse pain for free.