I remember watching my daughter Maddie when she was little, as she would rock her baby dolls. Comments like, ‘You’re going to be such a good mommy when you grow up, honey’ would easily roll off my tongue. But with my son Nick, whenever he acted tenderly toward a doll or stuffed animal, I had to remind myself to tell him, ‘You’re going to be such a good daddy.’ After reading Lise Eliot’s Pink Brain, Blue Brain, I’m especially glad I made the effort.