Desubstantialization of Sexuality

Desubstantialization of sexuality names Freud's radical theoretical gesture of stripping sexuality of any fixed, self-enclosed essence or positive content. Rather than treating the sexual as a delimited biological or psychological substance that could, in principle, be fully described and taxonomized, Freud's move—as read by Zupančič—reconceives sexuality as structurally defined by its own impossibility of circumscription. The sexual is not a thing among other things; it is the persistent failure of any attempt to draw a clean boundary around it. This means that what we call "sexuality" is constitutively excessive: it cannot be gathered into a positive substance without immediately overflowing its own definition.

In the Lacanian frame Zupančič inherits, this desubstantialization is the theoretical precondition for the entire conceptual apparatus of castration, the phallus, and jouissance. If sexuality were a substance, castration would be a simple subtraction from a positive whole. But because sexuality is defined by the impossibility of its own delimitation, castration is not a loss of something that was there; it is, rather, the structure that makes sexuality operative as a dynamic, desiring force. The "phallic signifier" is thus not a phallocentric anchor that substantializes sex, but precisely the signifier that marks this constitutive gap—that sexuality is always already cut, always exceeding whatever form it takes.

This concept appears in Zupančič's the-odd-one-in-on-comedy-alenka-zupancic (p. 219) within her argument about comedy, the phallus, and desublimation. It functions as a foundational theoretical anchor: before Zupančič can argue that comedy performs a materially concrete, embodied desublimation of the "infinite passion" of the subject, she must establish that Lacanian sexuality is not a substance to be idealized or debased in the first place. Desubstantialization of sexuality is thus the negative condition of possibility for her positive claim about the phallic signifier as a demystifying rather than mystifying function.

The concept stands in tight relation to several canonical cross-references. With respect to Castration, desubstantialization explains why castration does not subtract from a positive whole: if sexuality has no substance, then what castration marks is precisely this constitutive non-wholeness, the "structural coincidence of a lack and a surplus." With respect to Jouissance, the concept clarifies why jouissance cannot be reduced to measurable pleasure or biological satisfaction—it is the mode of satisfaction proper to a sexuality that by definition overflows any bounded form. With respect to Beyond (the pleasure principle), desubstantialization resonates with the Freudian insight that the drives exceed homeostatic regulation: sexuality, uncontainable by any positive description, is structurally "beyond" any economy of needs. And with respect to the Phallus and Objet petit a, it explains why these are not substantial objects but functions—placeholders for an absence at the heart of sexuality itself. The concept is thus less an isolated coinage than the explicit naming of a presupposition that structures the entire Lacanian clinic of sex and desire.

The Odd One In: On Comedy (alt. ed.)Alenka Zupančič · 2008 (p.219)

Freud's fundamental move was to desubstantialize sexuality: the sexual is not a substance to be properly described and circumscribed, it is the very impossibility of its own circumscription or delimitation.

The theoretical weight of the quote lies in the double move compressed into a single chiasm: "not a substance to be properly described and circumscribed" is immediately reversed into "the very impossibility of its own circumscription." The term "impossibility" is doing crucial Lacanian work here — it relocates sexuality from the register of the Symbolic (describable, bounded, symbolizable) into the register of the Real (that which resists symbolization), making the failure of definition not a defect of our knowledge but the positive structural feature of sexuality itself.