It should be noted that the size of penis has a certain relationship with age, region, height, weight, fatness and testicular size. People are tall and thin, and the penis size of normal adults naturally has great individual differences. Especially in the case of weakness, individual differences are even greater. Many teenagers find that others' penises are "bigger" than their own when taking a bath, and they will feel very upset and even dare not take a bath in the bathroom. In fact, there is a "visual error": if you can look in front of the cupboard mirror, you will find that your penis is not smaller than others. Besides, as long as the secondary sexual characteristics develop normally, there is no penile deformity and testicular atrophy, and the erectile function of the penis is good, what harm does the penis "small" have? Whether an organ is normal depends not on its function, but on its size.