The male reproductive system, also known as the male genital system, is located in the perineum, including the penis, testicles and scrotum organs. The reproductive system usually develops and matures gradually during puberty. 1. Penis: It is divided into glans, penile body and prepuce, etc. It is usually fixed and molded during puberty, and common abnormalities include hyperextension of the foreskin, prepuce and other problems. 2. Testicles: one on each side, of proportionate size, smooth surface, no pain under normal condition, when squeezed, or when inflammation occurs, it may be accompanied by redness, swelling or pain, above the testicles, there are spermatic cords connected with them, the spermatic cords are mainly to provide nutrients and blood supply to the testicles. 3. Scrotum: Located on the outside of the testicles, it wraps around the testicles and is a kind of protection for the testicles. Generally, there are many folds of skin with good ductility, and it can moderately change the size and looseness according to the temperature. The male reproductive system gradually develops and matures during puberty, that is, the development and maturation of the first sex signs, after which it undertakes male reproductive tasks. In daily life, attention should be paid to maintaining reproductive hygiene, and when abnormalities are found in the perineal organs, they should go to regular hospitals for consultation and treatment.