What are the hazards of external ejaculation?

Patient's question:

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

Doctor's answer:

The Dangers of Coitus Interruptus
First, it is prone to causing contraceptive failure. Coitus interruptus refers to immediately stopping sexual intercourse at the moment of climax, just as ejaculation is about to occur, allowing the semen to be expelled 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 leak out along with the contraction of the vas deferens and enter the vagina. Although the amount of this semen is small, it contains the highest number of sperm, making pregnancy more likely.
Second, it is easy to cause sexual neuroexhaustion. Throughout the sexual act, a man's sexual response is controlled by the cerebral cortex. The psychological and physiological stimuli during intercourse trigger 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 to achieve 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, resulting in premature ejaculation, impotence, and other conditions.
Third, it is easy to 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, the function of the central nervous system and the seminal emission center in the lumbosacral region may be impaired. Prolonged exposure to this situation can easily lead to functional anejaculation.
Fourth, it is easy to cause sexual apathy in women. When intercourse reaches climax, women may not yet experience sexual satisfaction. If men forcibly interrupt intercourse and practice coitus interruptus, it can cause psychological distress to women, leading to sexual apathy.
Fifth, it is easy to cause discord between couples. Although coitus interruptus may seem like a form of contraception, its high failure rate can lead to mutual suspicion, distrust, and emotional distance between partners.