I reread the thread title: Men Shaving... I'll never understand
Since shaving is a personal preference for nearly all men, your understanding is not needed or required.
OTOH, if facial hair or any other practice is imbued with social, cultural, religious or other significance, then that's fine for you, just don't start pounding on other's who do not share your beliefs because you're on the edge or maybe past it going towards fanaticism and ideology. And we all know how that ends...
Since shaving is a personal preference for nearly all men, your understanding is not needed or required.
OTOH, if facial hair or any other practice is imbued with social, cultural, religious or other significance, then that's fine for you, just don't start pounding on other's who do not share your beliefs because you're on the edge or maybe past it going towards fanaticism and ideology. And we all know how that ends...

Seriously, I don't know how you could possibly get a clean wipe with a layer of fur down there.