Cheryl S. sent a screen shot from JC Penney featuring skeleton pajamas in black for boys and pink for girls. The classic skeleton costume is black because it’s supposed to fade into the night, remember. Putting it in pink ruins the effect entirely, unless your main point is to make sure that everyone knows your toddler is a girl.Lisa Wade, PhD is a professor at Occidental College. She is the author of American Hookup, a book about college sexual culture, and Gender, a textbook. You can follow her on Twitter, Facebook, and Instagram.