Perianal hair is a physiological phenomenon, so don't worry; If you feel inconvenient, you can perform laser cosmetic surgery and cold contact laser hair removal on the snow skin, which has the advantages of safety, painless and permanent hair removal.
In fact, people evolved from apes, and apes have hair all over their bodies, including the vicinity of the anus. With the evolution, human hair is becoming scarcer and scarcer, but there has been no evolution near the anus for some time, that's all.
Do not believe, you wait, after thousands of years, maybe people will lose all their hair and be naked.
Most of the long hair in the human body is hereditary and related to the local climate. Generally speaking, people's hair will be less or thinner in hot weather, but it is the opposite in cold weather, but this is not absolute. In addition, long pubic hair has a great relationship with human secretion. When hormones are secreted more, the human body will naturally grow hair. Generally speaking, it is only a matter of how much adults have long hair.
With evolution, human hair is becoming scarcer and scarcer. Anal hair, like wisdom teeth and cecum, belongs to human micro-organs.
Anal hair can keep the anus ventilated, and it can also remove bacteria that can invade the anus and prevent bacterial infection. However, too thick anal hair may cause bacteria in stool to attach to anal hair.