There is no direct relationship between the amount of male hair and sexual function, less hair does not represent poor function. The main reason is that a part of the testosterone testosterone produced by the testes is converted into dihydrotestosterone when it reaches the hair bulb cells with the blood circulation, thus inhibiting the growth of hair. During this process, the overall androgen level in the serum does not change significantly. In other words, what is changed is only the proportion of certain components of androgens, which does not have a significant effect on sexual function. In particular, the higher the androgen level in young men, the more sexual desire they will have, and the more dihydrotestosterone they will produce, the more likely they will lose hair and have less hair. There is not necessarily a relationship between the amount of hair and sexual function.