(Original post by aftrglw)
It's not just a religious thing, it can be a cultural one. I'm American and I'm circumcised like most Americans. Trying to tie it to religion is unfair, just like there's tons of philosophers who are pro-life for reasons of rationality, rather than religion.
Obviously, it isn't inherently cleaner... but it does tend to be cleaner and smell less, at least if you're comparing two guys of comparable showering practices. It takes more effort to clean an uncircumcised penis, because it's not all exposed. Unless you're taking the time to clean everything well, the circumcised guy will tend to be cleaner and smell nicer. I haven't directly compared of course, but I've dated several European girls that have confirmed it.
There are of course medical reasons too:
Circumcision: Medical Pros and Cons At A Glance
Inability to retract the foreskin fully at birth is not a medical reason for a circumcision.
Circumcision prevents phimosis (the inability to retract the foreskin at an age when it should normally be retractable), paraphimosis (the painful inability to return the foreskin to its original location), and balanoposthitis (inflammation of the glans and foreskin).
Circumcision increases the chance of meatitis (inflammation of the opening of the penis).
Circumcision may result in a decreased incidence of urinary tract infections.
Circumcision may result in a lower incidence of sexually-transmitted diseases and may reduce HIV transmission.
Circumcision may lower the risk for cancer of the cervix in sexual partners.
Circumcision may decrease the risk for cancer of the penis.
There is no absolute medical indication for routine circumcision of the newborn.
You can find that article here: http://www.medicinenet.com/circumcis...ns/article.htm
The reason to do it at infancy is because the procedure is simpler and the infant won't remember it. I don't regret having it done as a baby at all, but I wouldn't want to go through it now that I know all the joys of post-puberty and I'd remember the pain of it afterwards. Just the thought of it makes me cringe...