Many people have a lucky mentality when having sex, so they don't use contraceptives or condoms. In fact, if ejaculation is done outside the body, although it can reduce the probability of pregnancy, it is not completely safe. Because during sexual intercourse, some semen can enter the vagina and cause pregnancy. So if you don't ejaculate the first time, there is still a certain probability of getting pregnant. Coitus interruptus refers to a method of ejaculating outside the body of the partner by pulling out the penis when ejaculation is about to occur during sexual intercourse. It is often used as a contraceptive method, but this method is unreliable and has certain harm to the body. Many people prefer to use withdrawal as a contraceptive because birth control pills have significant side effects, such as depression, vaginal dryness, loss of libido, weight gain, headaches, etc. The withdrawal method of contraception does not require any cost, does not require any tools or drugs, and does not affect the pleasure of sexual intercourse. Leading to contraceptive failure Ejaculation outside the vagina means that when sexual intercourse reaches climax and ejaculation is about to occur, sexual intercourse is interrupted immediately to allow the semen to be discharged outside. This natural contraceptive method often fails to achieve the purpose of contraception. There are three reasons why it is easy to fail: (1) Before ejaculation, sperm cells usually flow out of the urethra with a few drops as the vas deferens contracts. Each drop contains about 50,000 sperm. If it flows into the vagina, one drop of semen is enough to fertilize a woman. (2) At the most intense stage of the sprint, the timing of pulling out the penis may be too late because the man is attached to the pleasure, causing part of the semen to be ejaculated in the vagina; (3) Sometimes after ejaculation outside the vagina, the man immediately touches the woman's vulva with his hands to make her reach orgasm, or has sexual intercourse a second time not long after. In both cases, the fingers and penis may bring sperm into the vagina again. Causes neurasthenia During the entire process of sexual life, a man's sexual response is completed under the control of the cerebral cortex. The psychological and physiological stimulation during sexual intercourse will cause a series of changes and reactions. High excitement will cause mental tension, accelerated heartbeat, increased blood pressure, etc. At the same time, the reproductive organs become erect due to congestion of blood vessels and contraction of muscles in the penis. If sexual intercourse is suddenly interrupted when reaching climax, it is bound to have adverse effects on sexual psychology. Over time, it is easy to develop sexual neurasthenia, causing premature ejaculation, impotence and other symptoms. |
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