and refractory period); details of the ejaculatory response, sensation, frequency, and sexual activity/techniques; cultural context and history of the disorder; partner's assessment of the disorder and if the partner has any sexual dysfunction themselves; and the overall satisfaction of the sexual relationship are all important to garner during history-taking. Relatively normal latency to orgasm with self masturbation as compared to insertive or intravaginal ejaculation latency time reasonably rules out most of the organic causes of DEs. Treatment Primary, lifelong DEs are poorly understood and hence less well studied. Organic causes in the acquired DEs should be addresses promptly. Retraining masturbatory practices and re-calibrating the mismatch of sexual fantasies with arousal are essential when these are contributing to DE. Techniques geared towards reduction of anxiety are important skills that can help overcome performance anxiety, as this can often interrupt the natural erectile function through orgasmic progression. Sex therapy Therapy usually involves homework assignments and exercises intended to help a man get used to having orgasms through insertional intercourse, vaginal, anal, or oral, that is through the way to which he is not accustomed. Commonly, the couple is advised to go through three stages. At the first stage, a man masturbates in the presence of his partner. Sometimes, this is not an easy matter as a man may be used to having orgasms alone. After a man learns to ejaculate in the presence of his partner, the man's hand is replaced with the hand of his partner. In the final stage, the receptive partner inserts the insertive partner's penis into the partner's vagina, anus, or mouth as soon as the ejaculation is felt to be imminent. Thus, a man gradually learns to ejaculate inside the desired orifice by an incremental process. Medication There is as yet no reliable medication for all cases of delayed ejaculation. Some studies have found that PDE5 inhibitors such as Viagra have little effect. Viagra can have a delaying effect on ejaculation, possibly through additional effect in the brain or decrease of sensitivity in the head of the penis. Cabergoline, an agonist of dopamine D2 receptors which inhibits prolactin production, was found in a small study to fully restore orgasm in one third of anorgasmic subjects, and partially restore orgasm in another third. Limited data has shown that the drug amantadine may help to relieve SSRI-induced orgasmic dysfunction. Cyproheptadine, buspirone, stimulants such as amphetamines (including the antidepressant bupropion),