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Hmm...maybe it comes from "those electric shaver guys". The electric preshave preps are alcohol and oil so it dries your face and leaves a layer of lube so you get that premium baby butt smooth shave...

Some folks like to use it. They feel it pre lubes their beard to make the going easier. Personally I never had much use for it though I did try it a few times.

There are many varieties and brands....