What are the dangers of withdrawal?

Patient's question:

Doctor, what is the meaning of withdrawal? Is it safe? Does it cause any harm to a man's body?

Doctor's answer:

The Dangers of Coitus Interruptus
First, it easily leads to contraceptive failure. Coitus interruptus refers to the act of immediately stopping sexual intercourse at the moment of climax, just before ejaculation, allowing the semen to be released outside the body. This natural contraceptive method often fails to achieve its purpose. The reason is that during sexual intercourse, when both partners reach climax, a small amount of semen may spill out along with the contraction of the vas deferens and enter the vagina. Although this amount is small, it contains the highest number of sperm, making pregnancy more likely.
Second, it can easily cause sexual neuroexhaustion. Throughout the sexual act, a man’s sexual response is controlled by the cerebral cortex. The psychological and physiological stimulation during intercourse triggers a series of changes, including heightened excitement that leads to mental tension, increased heart rate, and elevated blood pressure. At the same time, the reproductive organs become engorged with blood and muscles contract, resulting in erection. If intercourse is suddenly interrupted at climax, it inevitably has a negative impact on sexual psychology. Over time, this can lead to sexual neuroexhaustion, causing conditions such as premature ejaculation and impotence.
Third, it can easily cause functional anejaculation. During intercourse, when sexual excitement reaches its peak, the erection becomes harder just before ejaculation. If intercourse is forcibly interrupted at this point for coitus interruptus, it can disrupt the function of the central nervous system and the lumbar-sacral ejaculation center. Prolonged exposure to this practice can make a man more likely to develop functional anejaculation.
Fourth, it can easily cause sexual apathy in women. When intercourse reaches climax, a woman may not yet feel sexually satisfied. If her partner forcibly interrupts intercourse and performs coitus interruptus, it can cause psychological distress and lead to sexual apathy in the woman.
Fifth, it can easily cause discord between spouses. While coitus interruptus may seem like a form of contraception, its high failure rate can lead to mutual suspicion, distrust, and emotional distance between partners.