Reason vs 'Self Ownership'

The answer to the question what makes my body “mine” lies in the obvious fact that this is not merely an assertion but that, for everyone to see, this is indeed the case. Why do we say “this is my body”? For this a twofold requirement exists.

1. On the one hand it must be the case that the body called “mine” must indeed (in an intersubjectively ascertainable way) express or “objectify” my will. Proof of this, as far as my body is concerned, is easy enough to demonstrate: When I announce that I will now lift my arm, turn my head, relax in my chair (or whatever else) and these announcements then become true (are fulfilled), then this shows that the body which does this has been indeed appropriated by my will. If, to the contrary, my announcements showed no systematic relation to my body’s actual behavior, then the proposition “this is my body” would have to be considered as an empty, objectively unfounded assertion; and likewise this proposition would be rejected as incorrect if following my announcement not my arm would rise but always that of Müller, Meier, or Schulze (in which case one would more likely be inclined to consider Müller’s, Meier’s, or Schulze’s body “mine”).
2. On the other hand, apart from demonstrating that my will has been “objectified” in the body called “mine,” it must be demonstrated that my appropriation has priority as compared to the possible appropriation of the same body by another person.

As far as bodies are concerned, it is also easy to prove this. We demonstrate it by showing that it is under my direct control, while every other person can objectify (express) itself in my body only indirectly, i.e., by means of their own bodies, and direct control must obviously have logical-temporal priority (precedence) as compared to any indirect control. The latter simply follows from the fact that any indirect control of a good by a person presupposes the direct control of this person regarding his own body; thus, in order for a scarce good to become justifiably appropriated, the appropriation of one’s directly controlled “own” body must already be presupposed as justified.

It thus follows: If the justice of an appropriation by means of direct control must be presupposed by any further-reaching indirect appropriation, and if only I have direct control of my body, then no one except me can ever justifiably own my body (or, put differently, then property in/of my body cannot be transferred onto another person), and every attempt of an indirect control of my body by another person must, unless I have explicitly agreed to it, be regarded as unjust(ified).

— Informal translation from Hans-Hermann Hoppe, Eigentum, Anarchie und Staat (Manuscriptum Verlag, 2005, pp. 98-100; originally published in 1985).