It is believed that the female body is more complex, interesting and more difficult to study and regulate physiological processes from a medical point of view. However, male physiology may surprise you with some seemingly unnecessary manifestations.
Night sleep is the time of the body's recovery, rest of all systems, internal revision of all important units in such a complex machine as a person. While he is sleeping, various processes that have external manifestations take place inside him. Two such characteristic manifestations are erection and emission.
If you do not go into complex biological matters, a male erection is filling the cavernous bodies of the penis with blood and keeping them there with the help of special muscles. The penis becomes larger, harder and capable of intercourse followed by ejaculation. But this is if it speaks about an erection in general.
An erection happens repeatedly over the course of one night, which is quite normal for a healthy male body.
The nocturnal manifestation of this phenomenon has a slightly different nature. If in order for the penis to become a phallus (erect male genital organ), in a clear consciousness, you need an external or internal stimulus, a message from a sexual partner or your own imagination. For a nighttime erection, things are a little different.
As you know, sleep is an alternation of fast and slow phases. And if in the slow phase a person does not see dreams and does not manifest himself in any way outwardly, then the fast one is accompanied by vivid dreams, movements of the eyeballs, body twitching and … an erection. It occurs as a result of rising blood pressure during REM sleep. This happens several times a night and is physiologically quite normal.
Interestingly, even in the nineteenth century, it was believed that nocturnal erection was bad. It was considered as a disease and even invented special mechanisms that could rid a person of this. So, there were special "pants" in which a cover was put on the penis, which, when the penis hardened, pricked sensitively. The man woke up and the erection disappeared. The difference between an erection and a wet dream is that it is just an erect penis.
Pollution, on the other hand, can result from an erection, but not every erection ends in a wet emission. To put it simply, emission is the ejaculation during sleep. When a person has erotic dreams, he can reach orgasm without waking up. Nevertheless, the pleasure experienced is not a dream, as can be seen the next morning by the stains on the panties and the sheet. Full-fledged ejaculation or so-called sleep release occurs.
Pollution comes from the Latin "pollutio" - soiling, maraneo.
This is how an erection differs from a wet dream. The first may mean a transition to the second, but not necessarily. Erect phallus and ejaculation are different.