Sexual Relationship
ELI5
No matter how close two people get, there's no perfect "formula" for how a man and a woman fit together as sexual beings — not because something is broken, but because that gap is built into the very structure of language and desire, and all our attempts to bridge it are what keep us talking, writing, and desiring in the first place.
Definition
The Sexual Relationship, in Lacan's formulation, names not an empirical or sociological fact but a structural impossibility: the impossibility of writing—in the logical, mathematical, or symbolic sense—the relation between man and woman as sexed beings. "There is no sexual relationship" (il n'y a pas de rapport sexuel) does not mean that sex does not happen, but that no signifier, formula, or predicate can adequately capture the relation between the two sexes as a complementary or reciprocal whole. Man and woman exist only as positions within discourse—signifiers articulated through the phallic function and the not-all (pas-toute)—and these two positions are incommensurable: phallic jouissance, which structures the masculine side, cannot reach the Other jouissance that marks the feminine side, leaving no common symbolic ground from which a rapport could be inscribed. This impossibility is not a deficiency to be remedied but the negative foundation on which discourse itself is built: because the sexual relationship cannot be written, writing (and by extension analytic discourse) is required as a perpetual attempt to circle around what cannot be said directly.
This impossibility also has a formal dimension, made explicit across the three occurrences. The Saussurean bar—the graphic stroke separating signifier from signified—serves as the typographic index of the unbridgeable gap between the two sexed positions. Topologically, in Seminar XXII, the relation "x R y" cannot be given a consistent logical-mathematical elaboration; no operation on the Borromean knot or on toric space yields a formula that binds man and woman symmetrically. The sexual relationship is thus the hole around which the three registers (Real, Symbolic, Imaginary) are knotted without ever filling it. In the register of fantasy (as in McGowan's reading of cinema), the apparatuses of desire—fantasy, the objet petit a, the symbolic barrier—function precisely to disguise this impossibility, to make the inaccessible object appear momentarily approachable. When the barrier is removed and the subject reaches the ostensible object, the fantasmatic world collapses: the object reveals itself as nothingness, confirming that the sexual relationship was impossible from the start.
Place in the corpus
The concept of the Sexual Relationship occupies a foundational—if paradoxically negative—position across the corpus. In jacques-lacan-seminar-20-bruce-fink, it is the theorem that anchors the entire theory of writing and discourse: because the relationship cannot be inscribed, all writing is a symptomatic substitute for that missing inscription. This places it in direct dialogue with the Discourse of the Analyst and the Four Discourses more broadly: analytic discourse is the discourse that works precisely at the site of this impossibility, positioning objet petit a as the agent who sets truth in motion without pretending to deliver a sexual rapport. The Sexual Relationship's non-existence is thus the void that the discourses orbit without filling.
In jacques-lacan-seminar-22, the impossibility is reformulated topologically: the Borromean knot—whose three rings (Real, Symbolic, Imaginary) are held together only by their mutual entanglement—cannot generate a triple point corresponding to the sexual relation; phallic jouissance and the Name-of-the-Father emerge at distinct nodal junctions, but no junction yields a relation. This connects the concept to Topology (the insistence that structure is written, not merely said) and to Phallic Jouissance (the mode of enjoyment that, by being self-enclosed in the organ, structurally prevents reaching the Other sex). In the-real-gaze-film-theory-afte-todd-mcgowan, the concept is extended into the theory of fantasy and the gaze: the sexual relationship's impossibility is precisely what fantasy attempts to veil by erecting the symbolic barrier that makes objet petit a appear as an attainable object; the cinema of intersection makes this structural impossibility cinematically visible when the barrier drops and the object evaporates. Across all three sites, Negation is the underlying logical operator: the non-existence of the sexual relationship is a constitutive negation, not a simple absence, whose productive force generates discourse, writing, desire, and fantasy as its effects.
Key formulations
Seminar XX · Encore: On Feminine Sexuality, the Limits of Love and Knowledge (p.44)
Everything that is written stems from the fact that it will forever be impossible to write, as such, the sexual relationship. It is on that basis that there is a certain effect of discourse, which is called writing.
The quote makes the non-existence of the sexual relationship not merely a clinical observation but a transcendental condition: the phrase "it will forever be impossible to write" installs impossibility as permanent and structural, while "on that basis" converts a negative (the unwritable) into a positive generative ground—writing and discourse are effects of this constitutive failure, not compensations for a contingent one.
All occurrences
Where it appears in the corpus (3)
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#01
Seminar XX · Encore: On Feminine Sexuality, the Limits of Love and Knowledge · Jacques Lacan · p.44
**II** > **The function of the written<sup>1</sup>**
Theoretical move: There is no prediscursive reality — every reality is founded by discourse — and the non-existence of the sexual relationship is the negative foundation on which all writing (and analytic discourse specifically) rests; the bar in the Saussurean formula is the graphic index of this impossibility, marking that the written is precisely what cannot be understood, while man and woman exist only as signifiers articulated through the phallic and not-all positions respectively.
Everything that is written stems from the fact that it will forever be impossible to write, as such, the sexual relationship. It is on that basis that there is a certain effect of discourse, which is called writing.
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#02
Seminar XXII · R.S.I. · Jacques Lacan · p.127
**Introduction** > **Seminar 8: Tuesday 18 March 1975**
Theoretical move: Lacan argues that the Borromean Knot—understood through the topology of the torus—displaces the insoluble question of objectivity and grounds the three consistencies (Imaginary, Symbolic, Real) as irreducible, such that their triple points generate meaning, phallic jouissance, and the Name-of-the-Father respectively; identification is then reformulated as three distinct operations corresponding to the three registers of the knot's real Other.
it is strictly impossible to write x R y, in any way, that no elaboration of the sexual relationship can be made that is logical and at the same time mathematical
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#03
The Real Gaze: Film Theory After Lacan · Todd McGowan · p.222
29
Theoretical move: Fantasy's function is to transform the impossible objet petit a into an apparently accessible object of desire by installing a symbolic barrier; but when that barrier is removed and the subject directly accesses the object, the fantasmatic world collapses, revealing the object as pure nothingness—a structural impossibility that the cinema of intersection makes directly visible through the gaze.
Just as Peter is on the verge of realizing his desire and achieving the successful sexual relationship, he loses the object of desire altogether.