Having hair growth in the anal area is a relatively normal physiological phenomenon that occurs in many people. Depending on the ethnicity, Caucasians and Blacks have thicker hair than Asians, so the hair in the anal area will be thicker as well. The hair in the anal area actually has a normal, positive effect on the body, such as the anal area is in a humid, hot environment for a long time, sweating more, and having hair growth can help dissipate heat. And there is hair growth can increase the friction of the skin, does not lead to excessive sweat secretion around the anus, and appear sticky situation, for keeping this part of the clean, hygienic is a positive effect.