How do men clean their penis thoroughly?

　　Why? This depends on male Let’s start with the structure of the external genitalia.
　　
　　The most prominent part of the male external genitalia is the penis, the skin Thin and mobile.
　　
　　The skin of the penis is folded into a double layer called the foreskin. Before the age of 7, the foreskin is longer and can completely cover the head of the penis and the external opening of the urethra.
　　
　　With the development of puberty, the size of the penis increases and lengthens, the foreskin recedes, and the head of the penis is exposed in adulthood.
　　
　　However, about 30% of adults' foreskin still completely covers the glans penis. The glans penis and urethral opening can only be exposed when the foreskin is turned up by hand or when the penis is fully erect. This situation is called foreskin hyperplasia.
　　
　　When the foreskin is too long, too tight, cannot be turned up, or the glans and urethral opening cannot be exposed when erect, it is called phimosis, accounting for about 8%.