A growing body of evidences demonstrated that sexuality is an important topic in the clinical research of eating disorders (EDs), due to its association with specific psychopathological features, and etiological factors. The present review took into consideration the complex relationship between sexual behaviours, hormonal alterations and EDs psychopathology. Studies pertaining sexual behaviours in EDs were divided into those focusing on sexual dysfunctions, and those related to risky sexual behaviours. The limited number of studies on sexual dysfunctions, reported a controversial association with weight status and hormonal alterations, and a clear relationship with severity of specific psychopathology (e.g. body image disturbance). Risky sexual behaviours have been associated with impulsivity and dissociation, as well as with abnormal stress response. Finally, both restriction and uncontrolled eating have been found to be responsible for several complex metabolic alterations, determining varied sexual and gynecologic problems, such as amenorrhea, hypogonadism, genital vascular problems, infertility, and miscarriage, although it is also possible that alterations in feeding and stress hormones contribute to altered eating behaviour.