Theres an objection to self-ownership that Ive never understood; it runs something like this:
Self-ownership assumes that the self contains two aspects; the mind that does the owning and the body that gets owned. But there is no such radical dualism within the self.
But this objection is just weird. It not only presupposes that ownership has to be a relationship between nonidenticals, it attributes that view to the self-ownership proponent, and so infers that the self-ownership proponent must really be talking about some relationship between different parts of the self and so must hold some controversial metaphysical theory. But clearly anyone who believes in self-ownership obviously does not regard ownership as necessarily a relation between nonidenticals.
Thus self-ownership does not assume any position whatever about the relation between mind and body. You can think mind and body are identical; or distinct but nonseparable; or distinct but separable its just completely irrelevant to the self-ownership question. Self-ownership isnt supposed to be a relation between two parts of you, its supposed to be a relation between you and yourself.
So even if the objectors think ownership must be between nonidenticals, the first mystery is why they would attribute this view to self-ownership proponents the very people who by definition do not accept it. But the second mystery is why the objectors think ownership must be between nonidenticals in the first place. To own something is just to have certain rights of decision-making over that thing, including the right to exclude others from such decision-making over it. Theres nothing in that definition that rules out bearing that relation to oneself. To own yourself is simply for you to have certain rights of decision-making over yourself, including the right to exclude others from such decision-making over you.