Like
eyelashes, present to prevent
dirt,
dust and other
crazy crap from sliding down your
forehead and into your
eyes. Traditionally, having one eyebrow - that is, a
uni-brow, like the
nemesis of
Maggy Simpson - is a sign of
lycanthropy.
Mentats have long long eyebrows, and so does a prominent Japanese politician.
I want to transplant my goatee to where my eyebrows are so I can intimidate people even more when I waggle them Groucho Marx-style.