With practice, a man can learn a degree of control over the point when he proceeds to orgasm and ejaculation. Some men believe that male orgasm invariably results in ejaculation, but this is not always true. Some men have learned techniques for having multiple orgasms without ejaculating. Many of these techniques involving squeezing of the urethra such that the semen is not allowed to leave the body.
As the point of orgasm approaches, pre-ejaculate production will normally stop, and the hole in the tip of the penis becomes slit-like. The testicles become hard and are drawn up near the body in preparation. Breathing becomes heavier, and there may be involuntary contractions of major muscles (convulsions) throughout the body.
Finally, the psychological and physical pressure to ejaculate is released in a series of muscular contractions, usually about 8 major contractions spaced a second or so apart, followed perhaps by several smaller ones that can last 45 seconds or so.
Ejaculatory Force: Generally the more frequently a man has an ejaculation, the less force that ejaculation will have. If one is able to ejaculate two to three hours after his previous ejaculation, the semen just dribbles out.
Semen: There is a wide variation in semen production, but about 60 percent on average, comes from glands called the seminal vesicles, whereas 38 % comes from the prostate, with the remainder from glands such as the Cowper's.
Frequency of Ejaculation: According to a number of studies, Many post- pubescent young men report daily ejaculation, if not more frequently than that. This frequency gradually declines for most males to 2-3 time per week, which is typical of men in there forties. But there is still considerable variation among adult men of a given age.
Many men believe that it is somehow "un-masculine" to take advantage and enjoy the sexual experiences that occur prior to orgasm. They may have been taught at an early age that masturbation is somehow sinful or harmful to one's health. Orgasm and ejaculation become the focus of their partner-sex as well, rather than full enjoyment of all aspects of sexual feelings.
Once the arousal has begun, there are physical and psychological changes that take place in men. As outlined earlier, typically, an involuntary message is sent from the brain to the nerves that control a series of valves on the veins by which blood is drained from the penis. At the same time, blood continues to enter the penis through the main artery, the heartbeat rate increases, and blood pressure rises. With blood flowing in faster than it is returned, the penis starts to become erect.
When the penis is flaccid, touch seems little different than touch on any other part of the anatomy. But as erection starts to take place, the nerve endings concentrated in the penis start to become more sensitive and pleasant to the touch.
Sexual tension has started. The first sexual feelings are rather unfocused, but as arousal begins, the man's attention increasingly is focused on the sensations emanating from the groin area. Many men believe these sexual sensations occur only in the penis, but there are many other places in the groin area that are quite sensitive as well.
Equally interesting are the psychological changes that are taking place, something that few men acknowledge. At the initial stages of arousal, the man has no particular psychological "urge" to press forward to ejaculation. But as the arousal and erection continues, the psychological urge to press forward to ejaculation becomes stronger and stronger. This is the essence of building sexual tension. Psychologically, the man experiences the feeling of wanting more and more stimulation to continue and increase the intensity of the sexual feelings.
The entire experience can be likened to the winding of a "sexual" spring. Increasing stimulation causes the "sexual" spring to be wound tighter and tighter, increasing the sexual tension. These sensations are extremely pleasant, but at the same time, the unreleased tension is also described as very "frustrating" by most men. Interestingly, some men describe this as a "delicious" frustration, and many agree that it is among the best, if not the best of experiences that life has to offer. The tighter the sexual spring can be wound, the more exciting the sexual "ride" and the more "extreme" the ultimate release will be. This is a human experience not to be missed. Fully recognizing this and fully taking advantage of these sensations and psychological urges in an effort to more completely enjoy them for a longer period of time without moving directly forward to orgasm, something that most men must learn. But the results are well worth the effort, both in terms of the man's own enjoyment as well as for the benefit and enjoyment of a sexual partner.
Once the orgasm is complete, the valves which had maintained the erection, are opened and the penis is drained of blood so that within a space of a few minutes it has returned to its flaccid state.
Some research has suggested that testosterone produced by the sex organs in males and the adrenal glands (on top of the kidneys) in females, has less to do with whether a man will become sexually aroused than is widely believed. Other recent research suggests that it is not testosterone, but a compound closely related to testosterone that is important. Ordinarily, after ejaculation, a man has no further interest in sexual activity of any kind. For a period of 10 minutes to perhaps more than an hour, or even days for older men. During this refractory period a man is physically unable to achieve another orgasm even if he is able to maintain erection.
The generally pleasant feelings of satiety, lack of interest in further sexual activity and sleepiness following the male orgasm (which many women do not appear to fully understand or appreciate) are primarily linked to a chemical called oxytocin that is released during orgasm.