cleaner Well, while smegma might be less noticible, still having a foreskin doesn't make it dirtier. Modern bathing practices make this sort of irrelevant. healthier Medical groups tend to disagree last longer in bed This really depends on the pwerson and would be quite hard to determine scientifically looks nicer Totally subjective. I think uncut looks nicer. feels nicer Again totally subjective. It's easier to masturbate an uncut cock, as the forskin slides over the head easily without lube. most girls like it better I can't comment, but is this really a concern? Personally, if I've gotten as far as showing my dick to someone else, they're not gonna care if it's cut or not. Pros of leaving it naturally? Well, at birth, it's one less procedure and potential source of complications such as infection. It's also an extra cost. And foremost it causes pain to the child. Lastly, it makes an irreversible decision for the child about the child's body when the child has absolutely no control over it. Doesn't really seem right. There aren't any other widely practiced body mods on children that aren't reversible.