Circumcision: the removal of some or all of the foreskin from the penis. Origin of the word 'circumcision comes from Latin, circum and coedere, meaning around to cut.
Wikipedia Hosts an extensive study on circumcision, both for and against. It is at this time very controversial, and the practice of circumcision has been on the decline. Many studies, medically do not prove or disprove the the benefits.
However, humans have many views on this subject. Historically, there is evidence of circumcision dating back to Ancient Egypt to the 23rd century BC. Although in The Old Testament, circumcision is considered a Commandment of God.
One thing which stood out for me the most was The Roman Catholic Viewpoint:
The Catholic Church condemned the observance of circumcision as a mortal sin and ordered against its practice in the Ecumenical Council of Basel-Florence in 1442.