The norm for Israel was infant circumcision. Circumcision is the removal of the foreskin. It's a male thing. It sometimes makes us squirm to think about it and some people today oppose it. That makes us squirm more.
Female circumcision is an important justice issue for women today.
SOME scholars think this line means literally a second time, because the Egyptian way to circumcise was less thorough, and so it needed to be done again to be satisfactory for Israel. This is how to read the explanation in verses 4-7 . It is a rite that initiates an individual into the faith community. Baptism applies to women as well as men 2. These links jump to outside sites for further information.