Sex, as treated across the depth-psychology corpus, resists reduction to any single framework. The literature spans at least four major registers: the psychoanalytic, the archetypal-Jungian, the neurobiological, and the relational-clinical. Freud establishes the foundational coordinates in the Three Essays on the Theory of Sexuality, where sex is inseparable from libido, infantile development, and the erotogenic zones — a biological-economic model in which tension, satisfaction, and neurotic symptom formation are all expressions of one underlying sexual economy. Jung and the post-Jungians, as Samuels documents, contest this framework, pressing on the distinction between sex and gender, and disputing whether biological substrate adequately accounts for psychic life. Hillman, working in the archetypal mode, relocates sex within the image-instinct continuum, arguing that fantasy is not the sublimation of desire but its formative pattern. Perel approaches sex clinically and culturally, interrogating how domesticity, Puritanism, and the conflation of love and desire conspire to extinguish erotic vitality within committed relationships. Panksepp grounds sexual behavior in neurochemistry and brain organization, insisting on cross-sex neural gradients while refusing pathologizing readings of sexual variance. Masters situates sexual maturity within a broader developmental matrix requiring emotional, moral, and spiritual integration. The corpus as a whole treats sex as a site where biology, culture, psychology, and spirit converge — and frequently collide.