The first physical sign of the initiation of puberty in males is the enlargement of the testes and scrotum, which usually occurs around the age of 10. This is followed by the appearance of pubic hair, which is the precursor to secondary sexual characteristics. The penis then grows and thickens, the body rapidly grows taller and more muscular, beard and armpit hair grow, and the voice becomes lower, while the prostate and seminal vesicle glands enlarge and begin to secrete fluid, and sperm is produced. Usually the first spermatozoa are produced between the ages of 13 and 15. The development of male genitals and secondary sexual characteristics can be divided into five stages: 1. Before the age of 10 years, the testicles have a volume of only 1 to 3 milliliters, and secondary sexual characteristics are not obvious. 2. Around 10 to 11 years of age, the testes and scrotum increase in size. Around 12 to 13 years of age The penis grows and thickens, and pubic hair grows from few to many, darkens, thickens, and curls. 4.Around 14 to 15 years of age, the penis and scrotum enlarge further, the color of the scrotum deepens, the head of the penis develops fully, and the pubic hair is distributed in the form of diamond or shield. 5, 16 to 17 years of age or so, the shape and size of external genitalia approximate the adult type, close to sexual maturity. General Chinese men’s static length: 6.9cm-9.4cm; erect length: 13.5cm-15.3cm. Penis size is related to race! Penis length does vary among men, and it is not directly proportional to the size of a person’s appearance. It is not proportional to the size of a person’s appearance. There is also a racial relationship, for example, the genitals of Caucasians in the West are generally larger than those of the yellow race in the East, but the size of the penis is not indicative of manliness. Penis size is not directly related to height, hand size, etc. Statistics show that among yellow men, the flaccid penis averages 5-10 centimeters, and the erect penis averages 10-15 centimeters, with slightly shorter than that being normal. It has also been found that individuals with shorter flaccid penises are more flexible, and their erect lengths are similar to those of longer flaccid penises, with little difference. Additionally, shorter penises are also somewhat easier to erect. Penis size has nothing to do with sexual well-being! It has always been believed that a man’s penis is directly proportional to his sexual ability. There are many men who are proud of their large penis or feel inferior because of their small penis, in fact, sexual ability has nothing to do with size. In fact, sexual ability has nothing to do with size. The quality of sex is directly proportional to the man’s skills. There are many people who believe that women will get more pleasure from a larger penis, in fact, there is only psychological satisfaction here. According to research, a woman does not recognize the size of the penis from the sensations in the vagina, and the part of the body that can give a woman pleasure is at the opening of the vagina. For a perfect sex life, the hardness and strength of the penis erection (including durability) is more important, and the size of the hardness and strength does not have much to do with the length and thickness of the penis itself, especially not with the length.