Hair.

"You know, you should really get some highlights in your hair."

"Why?"

"It would brighten it up! It would make it look nicer!"

"I hate dyes. I refuse to do it. I think my hair is okay as it is."

"Well, I think some red highlights would really make you look good."

"...At least you're saying red, not blond."

"Blond? No. You're already yellow."