I have 4 younger sisters. One of them is nine. I'm not talking about her . . . not yet The three others are 22, 20, and 18. They are beautiful girls. They have long, lustrous hair. They wear stylish clothes and pretty jewelry. They own a belt, a hair ornament and a pair of shoes for every outfit. Their makeup is always done, they paint their nails, they smell good. Their hair is highlighted, their teeth whitened and every unwanted hair waxed away. They are slim and tanned and move with grace. I love them. And, in moments of tired and wistful weakness, I envy them. Yes, even when I know all the reasons why I needn't. I can't help it. I am still a girl too. And some days, when my hair isn't washed and my clothes are rumpled, when my face hasn't seen makeup for days, or even weeks, when I haven't had my hair cut in nearly 6 months, when I'm not even sure if I put deodorant on, when I literally can't remember the last time my nails got painted or I bought a...