Discovering that I was having a daughter, and then a second, was life altering for me. I struggled for most of my life with worries about the size of my feet or the shape of my thighs, longing to be shorter and thinner, blonder and prettier. I had only fleeting moments of understanding the preciousness of my form. And then I became a mom of girls, and I realized that I had a duty, a moral responsibility to do everything in my power to help them understand the magic of who they are, from their curls and their cow licks, to their strong calves and long, powerful torsos. We face the mirror each night and call out: Good night strong.Good night smart.Good night pretty.Good…