Rolfe
Adult human female
Not sure exactly in what kind of cases cosmetic surgery is offered by the state to children, and at what age. Cleft lip is an example where many states intervene with cosmetic surgery at age 9 months. Focusing on "modification" or "for fashion" might not lead us anywhere, the bottom line is what we understand as "natural" and "beneficial" for the child. If a pill existed that safely glues up the appendix of a child once and for good, they would probably be prescribed to infants in nationwide campaigns.
Not before there had been rigorous safety studies and a large body of literature demonstrating both safety and efficacy. Also, nobody would go near infants with it unless it had also been shown that later treatment wasn't possible.
Now, if you can find something as serious as appendicitis that circumcision prevents with say a 99% success rate, we'd probably be having a different discussion here.
Rolfe.