Hmm. Interesting. My understanding was that only geldings need to be cleaned and that stallions "self cleaned". Also, since there are no geldings in the wild, it was never a problem.
My grandpa is an old fashioned "cowboy" and he says horses don't need their feet done and that it's just a waist of money. His argument was always "They didn't get their feet trimmed in the wild and they were just fine." Well, I was reading and I came across a study saying that basically the majority of wild horses have unsoundness issues due to their hooves. My argument before that was usually "I think since we technically 'force' them to carry us around and obey to our every wish, the least we could do is make them as comfortable as possible while doing it."
"You know, for as long as I can remember, I've had memories." ~Colin Mochrie