There are several taboos around penile tumescence, better known as spontaneous erection. However, a recent study published in The Journal of Sexual Medicine explains the natural reason why this physiological mechanism happens in man.

According to a study by Ohio State University, men think about sex about 20 times a day; however, the morning erection does not obey sexual arousal, not even the so-called erotic dreams.

The spontaneous erection is triggered by the relaxation of the musculature of the corpora cavernosa and the arteries inside the penis. What increases the flow of blood and oxygen to the penis, with the consequent increase in volume, 12 to 14 centimeters approximately…

This natural mechanism is important to preserve the good functioning of the genital organ.

Contrary to what the name suggests, erections are not only morning, they also occur at night about five times, with a duration of 15 to 40 minutes each.

The nocturnal penile tumescence occur during REM sleep, characterized by greater eye movement and great physiological activity; for example, an increase in the level of testosterone.

It is believed that the high level of testosterone at first hour of day, plus the urine accumulated in the bladder, stimulate the erection.

The physiological phenomenon has its peak during adolescence, between 13 and 15 years, when the man spends 30 percent of his sleep time with a penile erection.

The absence for several days of an erection on waking or experiencing pain in the erect penis can be signs of a condition and it is recommended to consult the doctor for HGH injections.

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