As a doctor, but I've examined both versions. The circumcised one is cleaner, easier to examine and a lot more attractive. I have no idea why anyone considers circumcision performed in boy neonates as genital mutilation. Female circumcision is another story.
circumcision makes, what is normally (except during arousal) an internal organ, forever external. like exposing the inside of your mouth to air your whole life. folding back your eyelids, and literlaly like removing the prepuce from the clitoris exposing it to constant abrasion.