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My best friend in high school, his father was a barber, so all us guys on the wrestling team got our hair cut for free. I saw him take lather & smear it on a barber hone(didn't know it was a barber...

I don't think it has anything to do with "necessity"; razors were honed for hundreds of years without the help of 3M. I just don't want any part of my razor, other than the edge , touching stone....