Circumcision
Circumcision is very important to most branches of Judaism, with over 90% of male adherents having the procedure performed as a religious obligation. The basis for its observance is found in the Torah of the Hebrew Bible, in Genesis chapter 17, in which a covenant of circumcision is made with Abraham and his descendants. Jewish circumcision is part of the "brit milah" ritual, to be performed by a specialist ritual circumciser, a "mohel", on the eighth day of a newborn son's life, with certain exceptions for poor health. Jewish law requires that the circumcision leaves the glans bare when the penis is flaccid. Converts to Conservative and Orthodox Judaism must also be circumcised; those who are already circumcised undergo a symbolic circumcision ritual. Circumcision is not required by Judaism for one to be considered Jewish, but some adherents foresee serious negative spiritual consequences if it is neglected.
Circumcision and law
One 1999 case, "Re "J" (child's religious upbringing and circumcision)" said that circumcision in Britain required the consent of all those with parental responsibility (however this comment was not part of the reason for the judgement and therefore is not legally binding), or the permission of the court, acting for the best interests of the child, and issued an order prohibiting the circumcision of a male child of a non-practicing Muslim father and non-practicing Christian mother with custody. The reasoning included evidence that circumcision carried some medical risk; that the operation would be likely to weaken the relationship of the child with his mother, who strongly objected to circumcision without medical necessity; that the child may be subject to ridicule by his peers as the odd one out and that the operation might irreversibly reduce sexual pleasure, by permanently removing some sensory nerves, even though cosmetic foreskin restoration might be possible. The court did not rule out circumcision against the consent of one parent. It cited a hypothetical case of a Jewish mother and an agnostic father with a number of sons, all of whom, by agreement, had been circumcised as infants in accordance with Jewish laws; the parents then have another son who is born after they have separated; the mother wishes him to be circumcised like his brothers; the father for no good reason, refuses his agreement. In such a case, a decision in favor of circumcision was said to be likely.