This is a very silly question
however, if I was a hair dresser, not only would I be a terrible one, but I would probably cut all hair off and keep it.
I used to work in a bar and enjoy drinking beer.. but got fired. but that was for getting into arguments with the bar flies.
I think the best thing is to just avoid hair dressers and not think about them.. ignorance is bliss.
now stop asking silly questions