Sexually transmitted diseases aren't a problem for men who practice safe sex. And penile cancer isn't very common. Nonetheless, circumcision does have medical justification. At the same time, though, it's never been absolutely demonstrated that it isn't true. But medical arguments only cover part of the territory here.
Circumcision is a powerful emotional issue for some people.
Other men wish so strongly that they had been circumcised at birth that they're willing to undergo some pain, at least a week off work, and six to eight weeks without intercourse to have it done. Deciding whether to have your newborn boy circumcised isn't necessarily simple. As a doctor, I can tell you that there are medical reasons for circumcision and that the surgery is much easier and less painful for a baby than for a grown man. But you have to weigh the other factors and choose.