It seems odd to me for a doctor to cut off a normal healthy part of a boy's penis (at any age) when there is no medical condition present that requires surgery for treatment. If the surgery is not medically necessary, why should it ever be done to a child?
If it is done at all, it should only be done when the boy is old enough to get a tattoo or to get his penis pierced. In other words it should only be done when the boy is an adult and if he gives his own informed consent for his body to be permanently modified.
There are reasons to get it done. I was amazed at some of them. Here is an example
There is a higher risk of gonorrhea and inflammation of the urethra (the tube that carries the urine from the bladder outside) in uncircumcised men. It has also been reported that other sexually transmitted diseases (such as chancroid, syphilis, human papillomavirus, and herpes simplex virus type 2 infection) are more frequent in uncircumcised men.
Then there were the other problems like Phimosis,Paraphimosis,Balanitis and posthitis,balanoposthitis etc. I never knew about any of these. If you care to read more the link I learned about this stuff is http://www.medicinenet.com/circumcision_the_medical_pros_and_cons/article.htm
Personally I believe it is a matter of choice but from the feedback I got from my sons they were happy to have it done.