Appetite appetite levels may increase and result in an increase of food intake. Decreased desire to eat is termed anorexia, while polyphagia (or "hyperphagia") is increased eating. Dysregulation of appetite contributes to anorexia nervosa, bulimia nervosa, cachexia, overeating, and binge eating disorder. A limited or excessive appetite is not necessarily pathological. Abnormal appetite could be defined as eating habits causing malnutrition and related conditions such as obesity and its related problems. Both genetic and environmental factors may regulate appetite, and abnormalities in either may lead to abnormal appetite. Poor appetite (anorexia) can have numerous causes, but may be a result of
Sexual desire and Sill found that the majority of men and women do not officially report themselves as having low levels of sexual desire until they are 75 years old. Many would attribute this lull to partner familiarity, alienation, or preoccupation with other non-sexual matters such as social, relational, and health concerns. Properly defining sexual desire is always a challenge as it can be conceptualized in many different ways. One must take into account the definition used by clinicians in the American Psychiatric Association's Diagnostic and Statistical Manual IV-TR (DSM-IV-TR) as well as what men and women understand their own desire to