This clinical study examines the prevalence of stealing and the personal and behavioural factors which distinguish stealing and non-stealing behaviour in a population of 312 female normal-weight bulimics. Bulimic patients who stole had poorer early interpersonal relationships, earlier onset of sexual feelings with greater subsequent sexual activity and increased illicit drug use. The suggestion is made that stealing is a marker of severity. In addition, bulimics who stole appeared to exhibit more obsessional qualities with increased ritualisation.