It's just soap and water, and takes barely 10 seconds while in the shower. It's not like as if those who are in their natural state undergo a lot of trouble for being left intact, at least not as bad as you've pictured it to be.
Quite the contrary, I would say. Especially considering the numerous nerve-endings present on the foreskin, which stretches and inverts to become the sides of the penis while "in use".
It's a wonder any ancient civilization other than the Jews survived since circumcision is obviously so medically necessary!
Seriously, teach boys to use soap and water properly and infection is not an issue.
I've had no problems with nerve endings THANKS. Further, little boys are not the cleanest people in the world so cleanliness is an issue. Finally, no matter how much you clean, there are crevices that trap bacteria. Coitus introduces much more bacteria.