any sexual disorder characterized by problems in one or more phases of the sexual-response cycle. The particular dysfunction may be primary, in which failure in sexual functioning has always been present in the person and happens in all sexual situations; or secondary, denoting any disturbance in sexual functioning that is not lifelong or that occurs only with some partners or in some situations. Examples of sexual dysfunction include sexual desire disorders; sexual arousal disorders such as erectile dysfunction; orgasmic disorders (e.g., female orgasmic disorder, male orgasmic disorder, premature ejaculation); and sexual pain disorders (e.g., dyspareunia). Formerly called psychosexual dysfunction.