What reasons would a boy have to have circumcision done?

Phimosis: I would not advocate circumcision in a boy without any medical reason. The only medical reason I am aware of is phimosis, tight foreskin that interferes with normal urination.

Circumcision: Circumcision is done mostly for religious reasons, rather than medical reason. The american academy of pediatrics guideline shows there is no medical indication to circumcision. But, it does cut down the risk of infection, cancer and phomosis(which is swelling around the penis).

The Evidence: Analysis of all the available research data by the american academy of pediatrics demonstrated a benefit of doing it versus the detriment of the risk. The benefit was described as "small", but this does mean there is an advantage to performing it than the risk of not.

Religion, ?hygiene: Religion is a good reason for all muslims and jews. Worthwhile for boys with urinary tract malformations like urethral valves, bladder reflux or kidney obstruction. Paraphimosis, where tight foreskin is trapped behind penile glans. Balanitis xerotica obliterans of foreskin. Very rare penile gangrene. Phimosis (tight foreskin) not absolute indication & may respond to steroid cream or dorsal slit.