Years ago, I learned to shave with just about any sharp, straight edge (yes, I even practiced with a razor sharp axe). It’s interesting how the ‘fine edge control’ transfers to other activities; using a kitchen knife, swinging an axe, cutting with a Xacto, etc.
In the apocalypse, I will be the clean-shaven villain, who is surrounded by all the hot mutant ladies who adore my pretty jowls!
Edit: I use cannabis daily. I found I can shave quickly with a straight razor (after years if practice), or I can shave high. But not both. FTR: cutting yourself a bit here and there simply isn’t as bad as it sounds.