I read a paper explaining the secrets of ancient Chinese medicine in China, and found it very reasonable. The author states that different people may have slightly different identities and qualities. Some people's physique and semen are beneficial to them, so some people are in good health when they are young, and they are in good health before development. After development, they will be accompanied by nocturnal emission and their physique will be weakened. After marriage, their physical fitness has dropped considerably. Another kind of people, on the other hand, have physiological rejection of semen. Before development, they are weak, and after development, they are strong. Better after marriage. This paper uses the ancient celebration phenomenon as an explanation. Some people, seriously ill, long for a wife, but are repelled by physique and semen. Some people don't respond or even die. Personally, it makes sense. (See Chen Leping's Close to Life: An Introduction to China's Medical Culture).