In borderline cases the "pencil test" was used to judge the kinkiness of the individual's hair.

A new prototype, developed by Sony, is thinner than a hair and is flexible enough to be rolled tightly around a pencil, even as it continues playing a video.

If it were, inevitably everyone who shaves on a regular basis would eventually be covered in pencil-thick or bigger hair sprouting out of their bodies from every place they shave.