The paper consists of the material obtained from a schizophrenic patient who attributed his sexual desires and nocturnal emissions to the food he had eaten. He was pre-occupied with somatic delusions about his gastro-intestinal tract and flatus. If he were not given what he considered a sufficient amount of food, his thoughts were not held under control and this led to spontaneous emissions. He thought that certain foods caused erections and that his flatus started rumours that he masturbated. Genital impulses were transformed into substitutive anal gratifications.