When males were running naked, on the plains of the Serengeti, hunting and fighting, the fore-flesh served as a protective sheath - actual utility. The sanitation issue was non-existent because penises has constant exposure to the open air.

When full time clothing arrived, the penis was then living 24/7 inside a closed sauna and germs had their heaven. Try to ponder how many thousands of years bathing was NOT the norm.

Circumcision was discovered to be a way to deal with foul odor that put off females in a big way. As soon as it was learned that you could get laid easier with a cut penis, the males converted nearly over night and the practice began to be reinforced via multiple channels: male authority, female favor, religion, etc.

With the advent of modern air-conditioning and higher standards for male grooming, the original motives for circumcision are diminished but not zero.

Circumcision is a non-zero issue because of how easy it is to make the case that a majority of modern females prefer the muscular vein exposed look of a cut penis.