If you're above 14 and have never dyed your hair. I feel sorry for you. Life must be pretty boring.
For **** sake it's just hair dye. I refuse to believe people don't know the process of dying hair.
Even if you don't ever dye your hair? How about people surrounding you? Do you live In a cave? Your mom, sister, brothers, family, friends? I refuse to believe that you've never witnessed someone dying their hair?