Psychiatric classification of erotomania yields a variety of possibilities, situating erotomania along a continuum with personality disorders on one end and the schizophrenic disorders at the other end. The “Postulat Fondamental” of de Clérambault breaks with this tradition. With Freud and Lacan it gives rise to a structural analysis. In considering the relation to the Other, it facilitates the differentiation between erotomanic (psychotic) and neurotic (hysterical) structures. In this case special attention is given to the fragile libidinal balance, a support supplying erotomania that can easily tip over into a terrifying eroticomania.