Sex or Surgery?

My favorite post from the last Feminist Carnival is this one. Which is more dangerous, sex or surgery? Can we at least be the slightest bit consistent: if we approve of one as a voluntary, consensual assumption of risk for pleasure and personal gain, we ought to approve of the other. One could even argue that the financial transactions involved in surgery are analogous to sex-for-hire in such a way as to make either cosmetic surgery immoral or prostitution legalizable....