How long is a good penis? Such questions are very common in male clinics, and many young people will feel inferior because of their relatively short penis and therefore come to the hospital 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 to 5 times or even more after erection, while some people can only increase less than 1 times after erection, feeling about the same size as when it is atrophied, 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 by using a straightedge along the penis after erection, against the penis root top to the bone until the length to the end of the glans, not from the skin surface to the end of the glans, so if measured in the latter way, the error will be large, the error is 5~7 cm or even more for people with obese body type. So very often it is not the penis that is short, but it is covered by subcutaneous fat. How long does a Chinese male need a penis? Ethnicity is by match, Asian women’s vagina is much shorter and thinner than European and American women’s vagina, and European and American men’s penis is thicker than Asian men’s. The average Chinese woman’s vagina is 7 to 10 cm long, and because of its elasticity, it can be extended to about 15 cm. A penis that is too long and too thick will not only not make the sexual partner feel comfortable; on the contrary, it will cause pain and injury, or even cause a vaginal tear and hemorrhage. The G-spot, where women are most easily aroused and cause orgasm, is located in the front 1/3 of the vagina, inside the front wall about 3 cm from the vaginal opening. Therefore, it is more important to be able to stimulate the G-spot through a good position and whether there is enough time and intensity to stimulate it than just the thickness of the penis. The average penis is long enough to stimulate this area. Of course, not all penis shortening is normal, and it is necessary to determine whether there are developmental problems, circumcision, occult penis and many other congenital and acquired abnormalities, and to carry out relevant treatment.