Circumcision is when the penis is soft, the glans and coronal sulcus of the penis are surrounded by the foreskin. In normal people, when the penis is soft, the glans and coronal sulcus must be completely exposed (this description is incorrect and we suggest deleting it). The glans and coronal sulcus as well as the inner plate of the foreskin have a normal secretion function. If the foreskin is too long, the normal secretion is blocked between the foreskin and the glans. If you are not diligent in cleaning, you will form foreskin scale, which will then irritate the foreskin as well as the glans, leading to glansitis of the foreskin. The recurrence of foreskin glansitis can lead to an increased incidence of cervical cancer in women if they get married in the future. If the penis is not erect and the foreskin completely wraps the glans and cannot be turned up to the coronal sulcus, circumcision is recommended to avoid recurrence of glansitis in the future; it will also avoid impotence and premature ejaculation (deleted); and most of all, it will stimulate the normal development of the penis (deleted).