Have Urology Questions? Ask a Urologist Online.
The plus point in having circumcision is that there is less incidence of penile cancer in circumcised males.
The exact reason is not known, but has been speculated as lack of deposition of smegma and less irritation of the glans penis in circumcised males. Also circumcision offers this protection if it is done in early neonatal period. Late childhood or adult circumcision does not offer this protection.Again the reasons are not available.
As far as UTI is concerned, it is recommended in males who have VUR - vesico ureteric reflux - a genetic condition of the bladder and the ureter.Otherwise it may not help reduce UTI in normal males.
Reduction in STI may be possible as there is less chance of foreskin injury if you are circumscribed but this is not mandatory.