Why do old women shave their eyebrows, then pencil new ones in? Nobody's eyebrows actually look like that. Besides, it looks stupid.
Thought of the moment:
Wouldn't it be cool to have caterpillars for eyebrows? No, not just bushy eyebrows... but actual caterpillars.
Of course you'd have to train them. Do when you were surprised, they would move upward. Or if you were really angry, they could turn down at a 45 degree angle just to show everyone how angry you were. If you were intrigued you could train one of them to move upward slightly while the other one stayed in place.
But you'd probably have to put leashes on them so they didn't crawl away while you were sleeping.