From a philosophical point-of-view a great deal has been discussed on exactly what the consequences are of being embodied. Maurice Merleau-Ponty (which I mentioned on another recent thread), is perhaps the most important philosopher to be familiar with for any issues dealing with the body and our experiential relationship to it. It's hard to pick a text for this, as his own stance on these matters changed dramatically over the development of his ideas, but anything after the 1950s is going to have a lot of discussion about bodies and their consequences. Michel Foucault is also very important because he touches on the ways in which our bodies are manipulated (socially, psychologically) for social ends. Either Discipline and Punish or The History of Sexuality are good texts from him to explore those issues.
For my part, the body is most interesting because it is has a dyadic relationship to our willful consciousness; it is the primary tool by which humans influence their environment, and the tool upon which all other tools depend--it is literally the source and conduit of all human power in every conceptual sense of that word. It is also an inescapable prison, the surface upon which everything thing that can possibly happen to us happens to us contacts, and there is no significant escape from that fact. That power/prison dyad mirrors closely prevalent thinking about how we treat bodies; putative rights to remain unmolested and have freedom of action are directly in recognition of the fact that whatever we are is inescapably tied to our bodies and only given meaning because of our bodies.
Hence our interests in maintaining control of our bodies are extremely potent. There is no reason that I can see why this can't extend into a legal or property interest in the same.