This provides an halakhic answer to our problem. Through circumcision he accepts the yoke of the kingdom of Heaven, having been marked to serve the Lord and fulfill all His commandments. Hence, the mitzvah of Milah appears in conjunction with the birth of a male child. This analogy between Adam and new-born child aptly reminds us of the basic purpose of human existence service of the Almighty. We can cite here but some of the many reasons suggested for the mitzvah of circumcision.
Several scholars place it on an hygienic basis.
Akedat Yitzhak includes this among the seven benefits he enumerates, claiming that it prevents the accumulation of decayed semen under the foreskin, which frequently necessitates surgery, beyond the ritual requirement, evidently, timely circumcision prevents disease. However, many commentators reject this reason arguing that God would hardly create man with a defect so that he might then remove it. And you shall circumcise and it shall be a token of the covenant. A more recent commentator notes that This is My covenant introduces this law, and it shall be a token of the covenant concludes it, thus underscoring the role of the covenant in the circumcision. However, the element of hygiene may have been adduced by the earlier commentators as a consequence and not as a reason of the mitzvah.