大多数男孩不需要。长大后，只有少数所谓的包茎的男孩需要做。
Is circumcision necessary?
The use of circumcision for medical or health reasons is an issue that continues to be debated. The American Academy of Pediatrics (AAP) found that the health benefits of newborn male circumcision outweigh the risks, but the benefits are not great enough to recommend universalnewborn circumcision. The procedure may be recommended in older boys and men to treat phimosis (the inability to retract the foreskin) or to treat an infection of the penis.
http://www.webmd.com/sexual-conditions/guide/circumcision
