Over the years, I've heard or read a number of times about the same story:
A little boy has a tight foreskin, but suffers no inconvenience from it (no difficulties in urination, no infections, nothing). At a certain age, no more than 6, sometimes earlier, a physician presses parents to intervene, citing possible future inconveniences in case the condition is left alone. Often, the first line of intervention is for the physician, nurse, parent or boy to try to retract the foreskin by force or, in a more human and modern way, by using some softening steroid cream (sometimes this first line of intervention is skipped). Then if this fails within a few months, the physician advocates circumcision, claiming it has no inconveniences. By the age of 7, the boy has his foreskin removed.
What puzzled me is that insistence on solving the issue at the age of 6 or 7 at most. These boys suffered no inconvenience, and it could be hoped that as they aged, experienced erections and played with themselves, the condition may improve by itself. The urgency of surgical intervention was unclear to me.
A first explanation I thought of was that it would have been difficult for physicians to tell parents to just let nature take its course, including letting the boy play with himself. Masturbation is still taboo and was even more so 40 years ago when I was growing up. But it did not quite explain the urgency.
My theory is that, if surgery must be done, it is easier to do it when the child is at most 7 because at those ages children don't quite understand things yet (in fact, age 7 is often called the "age of reason"). An older boy, say a 10 or 11 year old, would ask questions: "what exactly do you want to do to me", "what is the use of it". He could resist: "I don't have any problem down there", etc. Neither physicians nor parents want to drag a boy kicking and screaming to the hospital. So physicians advise intervention at ages when the boys won't realize what is going to happen.
What do you think of this theory?
I have another argument in its favor. I've read a few testimonies of men who had been circumcised at later ages during another surgical intervention. In all cases they had only been told about the main intervention (appendectomy, tonsils…) but not about the circumcision, and had a huge bad surprise to find bandages on their penis when waking up. This seems to indicate that older boys would be reluctant to be circumcised, and even resist if told explicitly.