This is my body,
which has a bit of a history. Christ said it while holding out a piece of bread. This was translated into Latin as "Hoc est corpus meum", which famously gave us "hocus pocus". Now, here's an interesting bit of trivia. William James said that "the whole hocus-pocus of erkenntnisstheorie begins" when the "concrete particularities" of "intervening experiences" between idealities and realities (which he also called "intermediaries") are made to evaporate, leaving only abstract schemata. I take it Tim's objection amounts to something along those lines.
Next, consider Descartes' peculiar claim in the Discourse on Method (Ch. 4).
I could pretend [feindre] that I had no body.
This also of course implies the ability to make sense of a sentence like
This is not my body.
(Not, mind you, "That is not my body.") Wittgenstein's remarks in On Certainty, as I read them, display the implausibility of that kind of pretence. In any case, I find myself generally in agreement with Tim (and James) that conceiving of the body "in the abstract" is a phenomenological error. But I am suspicious of statements like "The notion of embodiment is a massively more complicated issue [than Foucault's use of it as a stable term in his history suggests]," because I don't want to give anyone the right to tell me how complicated my body is. What is "disrespectful to the experience of having a body" is the act of calling a material reference to it into question. This is the line that has been so elegantly crossed and recrossed in the exchanges between Tim and Tony.
I have a feeling that Tony's aesthetic needs "the body" as a "single material signifier", needs to be able to indicate it with a single, simple gesture--"a child's body", "a pool of bruises". And I think he is right about this.
It is true that the sentence, "This is my body," is ambiguous. But its ambiguity may be very simple, cleaving (despite the threat of deconstruction) into an assertion on one side (the body's empirical aspect) and an injunction on the other (the body's normative aspect). There are gestures that say, "This is my body," and which are clear indications of significant material. Sometimes you are asked to confirm the body. Sometimes you are asked to obey.