Please don't brush my hair!!!

This morning, I asked S to come into the bathroom so I could brush out her hair. She started crying and said that she didn't want her hair to come out. If her hair was brushed out, she'd be bald and look like a boy. It was very difficult for me not to laugh. I kept a straight face and said, "Can I brush your hair?" She happily came into the bathroom and let me brush her hair, as long as I promised not to brush it out.