Human penis
In some religions, babies and young boys have their foreskins cut off. This is expected in Islam and Judaism. It is not required according to Christianity. Among Christians in the United States, it is more common among Protestants than among Catholics. In the United States, circumcision is less common among boys and men whose families came from Mexico, who are usually Catholic. In Judaism, infant males are required to have their foreskin removed as a sign of the covenant (ancient promise) made with God.