Well, listen, that’s a solid argument, but I have to admit that I do have a libertarian streak I suppose, and while I agree on the slavery matter, I’m not sure I want the state telling me what I can and can’t “consent” to with my body, especially in the bedroom.
@Heraclito makes a good point about slavery, and that’s the argument that the state then does get to put certain constraints, and I obviously agree with the prohibition of involuntary servitude – but on the other hand, if I voluntarily want to be someone’s slave, isn’t that my business?