Causes of premature ejaculation
Between 10 and 30 per cent of all men suffer the embarrassment and frustration of premature ejaculation, said Richard Longwell, M.D., chairman of the Department of Urologic Surgery at the University of Minnesota. "Dapoxetine puts an end to their frustration'and by extension that of their sexual partners."

Premature ejaculation, as measured by the American Medical Association's Dictionary of Sexual Dysfunction, occurs within two minutes of the onset of sexual intercourse. Mature ejaculation, by comparison, occurs more than seven minutes following penile introduction.

Is it a physical problem? It used to be thought that premature ejaculation was the result of a physical problem such as irritation or inflammation of the urethra (the tube in the penis for urine and semen) or prostate gland, and there were nasty treatments such as squirting silver nitrate into the opening. There is no evidence that premature ejaculation is caused by such conditions. In almost every case, the man is physically normal; very rarely, it can be the result of a neurological condition such as multiple sclerosis.
Is the penis hypersensitive? There is also no evidence that it happens because the penis is hypersensitive. Researchers tested the sensitivity of the skin of the penis in men who considered themselves premature ejaculators and men who were not, and found no difference. It also seems to be a myth that circumcision makes a difference; the American sex researchers Masters and Johnson tested the sensitivity of the glans (head) of the penis in circumcised and non-circumcised men and found them to be the same.
Is it hyper-arousal? Premature ejaculation is more likely when the level of sexual excitement and arousal is high. This why it is more likely with a new partner, and why it is common in young men during their first sexual relationships.
Is it just a habit? It is most likely that the time of ejaculation is simply a habit, starting early when a youth learns to masturbate or have sex as quickly as possible for fear of being caught. It is certainly more common in younger men. Like all habits, it can be unlearnt. Common-sense measures may help.
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