When I was younger, my dad used to shave until his skin bled, mostly because he has extremely thick facial hair (that I inherited) and he needs to press hard and repeatedly to shave even half of it off. This plus starving himself and generally being soy.
I don’t have anyone in my family who I suspect, all of them are typical men and women, no stories of anyone being GNC. My father might be a closeted fag, but not much else there.