This is a sign of guilt. A man may also ejaculate before he wishes to if he feels frightened that his technique is not good enough, and ejaculating quickly will prevent him from having to reveal his lack of experience. Believing that sex is bad because of what you were told as a child is another possible cause of premature ejaculation. If as a boy, you were punished for masturbating, you may have taught yourself to come quickly to lessen the chance of being found out and to minimize the guilt you felt at your own pleasure. Fear of getting too close to another person may also be a contributing factor.
Intimacy always brings with it the risk of loss, and the unbearable pain attendant on that loss.
Subconsciously, a man who gets sex over with quickly may be trying to protect himself from close emotional involvement. Several techniques can help men last longer, and these should be used in conjunction with examining the cause of the problem. Understanding what is wrong often brings its own release. The aim of these exercises is to learn to keep yourself below the point at which ejaculation seems inevitable for as long as possible. Men who do not have a partner can practice the first three steps.