In folklore, there is a popular saying that a good man is covered in hair. Body hair as the second male sexual characteristic, in the eyes of many people, is a representative of male characteristics and sexual ability. A Hong Kong magazine said that Lisa, the wife of Hong Kong star Daniel Wu, first fell for Daniel Wu because of a poster of him showing his body hair on a large scale. So, the male with thick body hair, his sexual ability is necessarily strong? The amount of body hair is related to hormones Body hair is the second male sexual characteristic, the appearance of body hair, is a boy into a man’s signal, but also a sign of male development and maturity. Body hair is often easy and tough, sturdy associated with, like the Three Kingdoms era of Zhang Fei, water marsh Liang Shan Wu Song, Li Kui, are the traditional concept of the fierce man. In ancient China, the man beard, chest hair, belly button hair, pubic hair even into a called “green dragon”, because androgen secretion is too strong to stimulate the hair follicles to make the body hair too strong. So, this man’s sex drive is considered particularly strong. The woman without pubic hair is called “white tiger”, because of the development process, androgen secretion too little, too much secretion of estrogen and lead to hairless, is also often considered sexually active, therefore, in ancient times there is often “green dragon with white tiger” said. The amount of body hair does have a certain relationship with androgens. Androgens are mainly testosterone in the bloodstream, which is transformed into active dihydrotestosterone by the action of 5-alpha reductase, and then combined with androgen receptors in the organs. Generally speaking, dihydrotestosterone stimulates the growth of hair follicle cells and body hair, while androgen receptors in the hair follicle also play a larger role in it. Of course, more androgens are not better. Patients with androgenic alopecia have high androgen levels, resulting in high oil secretion, thinning hair, and finally becoming “big bulbs”. On the contrary, men who lack the proper beard and body hair are often considered to lack manliness. In the ancient times, eunuchs and eunuchs were often criticized for their sparse body hair and thin voices due to the removal of their testicles. Sparse body hair is nowadays a pathological condition in the male clinical practice. The reason for this may be partly due to their testicular dysfunction, and partly due to a more specific disease, Creutzfeldt-Jakob syndrome (congenital varicocele dysplasia syndrome). Patients with this disease have small penises and testicles, no throat knots, and no sperm in their semen, which can affect his fertility. The number of male body hair is related to ethnicity on the one hand, and individual differences on the other. Generally speaking, European and American Caucasians have denser body hair, while yellow people have relatively less body hair. Although thick body hair is a marker of male sexiness, there is no medical evidence to suggest that there is a definite link between the amount of body hair and male sexual performance. And for some men with thick body hair, his sexual function may not be good. Although his body produces more androgens, if the receptors in his body are not sensitive to androgens, so that androgens are not distributed to where they should go, such as the penis, it may also lead to his poor sexual function. Meanwhile, the strength of sexual function is not only related to the level of systemic sex hormones (including androgens, estrogens, hypothalamic and pituitary hormones, etc.), but also closely related to the function of penile blood vessels, the integrity and sensitivity of nerve conduction pathways, general health and many other factors. An increased level of androgens alone does not indicate a strong sexual function. Therefore, women in the choice of male partners, not to “hair” to take people, to determine whether the male sexual function is normal, healthy, or through the contact between men and women, to see the specific sexual function of the situation to decide. Some men’s sexual function problems, the marriage test may not be able to find out, may only after marriage, or after having sex to know. The actual boyfriend, once he finds out that there is a problem, it is necessary to come to the urology department or male department for consultation. After all, sexual function can be more comprehensively evaluated by a professional physician’s consultation, blood hormone levels, and penile erectile function tests.