Circumcision removes a huge portion of the most sensitive erogenous skin a boy has. What possible reason could one have for doing that unless for religion? (As far as I know this means Jews and Muslims only, and, specifically, not Christians.)
The arguments about hygiene are flat wrong. The foreskin, even after the synechiae attaching it to the glans have all released, houses what is more an internal organ than an external one, just like in a female. Use of soap on the glans or foreskin, just like its use inside a female's outer genitals, is more likely to cause an infection than anything else. Urine is sterile, and just like in a female, helps wash out the foreskin. Any other washing should be done with plain water.
Also, an intact foreskin may be attached and unretractable even up to age 18. If sexual activity is desired and it is still not fully retractable, some cream and gentle stretching will do the job. Forceful retracting is a source of pain and infections. Leave the penis alone, just like you leave a girl's genitals alone, and you will have fewer problems.
Frankly, the belief that circumcision has any material health benefits is just plain wrong.
Last, an intact foreskin provides a kind of mechanical lubrication that eliminates the need for artificial lubrication. Why would you destroy that? In my experience most circumcision proponents have NO CLUE how this actually works and thus can see no benefit to having a foreskin.
I find it sad that parents are cutting off an organ they do not understand the function of.