Such a situation is very common in male outpatient clinics, mostly among young men, especially students and some men who need to live in group dormitories and go into public bathrooms for bathing. On the one hand, they will compare and comment with each other; on the other hand, they will compare with the main characters in AV movies, and they will feel inferior because of their relatively short penis, and therefore come to the hospital to ask for treatment and surgery. In fact, most people have normal penis development, but because of misconceptions in the understanding, which in turn leads to low self-esteem, anxiety, and even some people will produce depressive tendencies and really affect the psychophysiological health. The average length of the Chinese male penis is 10 to 12 cm), which refers to the erect length, not the length in the atrophied state. The erection factor is completely different for everyone, some people can increase the volume 3-5 times or even more after erection, some people can only increase less than 1 times after erection, and feel about the same size as when it is soft, just hardened. Therefore, the size of the penis under atrophy cannot be used to directly determine the length of the penis. Many people measure the length of the penis by themselves as the atrophied length, so it appears small and short. The length of the penis is measured after erection, using a straightedge along the penis, against the penis root top to the bone until the length of the glans end, not from the skin surface to the glans end, so if measured in the latter way, the error will be very large, the body type of obese people, the error in 5 ~ 7cm Yi or even more. So many times it is not the penis that is short, but it is covered by subcutaneous fat. How long does a Chinese male need to have a penis? Asian women’s vaginas are much shorter and thinner than European and American women’s vaginas, and European and American men’s penises are thicker than Asian men’s. The average Chinese woman’s vagina is 7-10cm long, and because of its elasticity, it can be extended to about 15cm. A penis that is too long and too thick will not only be uncomfortable for the sexual partner; on the contrary, it will cause pain and injury, and even cause the vagina to tear and hemorrhage. The G-spot, which is the most exciting and orgasm-inducing point for women, is located in the front 1/3 of the vagina, about 3cm from the vaginal opening. The average length of the penis is sufficient to stimulate this part. Of course, not all penis shortening is normal, but also need to determine whether there are developmental problems, prepuce, occult penis and other kinds of congenital and acquired abnormalities, and related treatment.