Knowledge: Black mascara makes each lash defined and prominent, contributing to an effortlessly glamorous look. An effective way to alter hair color is to use a hair dye.

Conversation:
My wife has brown hair, it's so pretty i really love it
Oh, that's nice. Your wife has the second-most common hair color for humans.
Huh, I didn't know that. Where is brown hair common?
It's common in various parts of Europe, as well as the US and parts of the Middle East.
Oh, interesting. She is from Macedonia actually.
Oh! That's pretty cool. Macedonia is an amazing country known for its rich history and stunning landscapes
What can she do to make it black?

Response: A hair dye is an effective way of changing one's hair color.