AbstractThis paper documents specific aspects of sex and eroticism, as well as related aspects of social behavior, in nine postpubertal male hypopituitary patients without hypogonadotropinism. The data reported on erection, ejaculation, masturbation, erotic imagery, intercourse and dating indicate an inertia of libido in these patients. Evidence for a deficit in socializing and pair‐bonding behavior is also present. Several alternative hypotheses for the observed deficits are considered.