Kevin I. sent in a great short clip instructing women workers newly employed in industrial factories during World War II on how to do their hair to maximize safety. It assumes both ignorance and vanity on the part of women and speaks to the lack of efficiency caused by efforts to remain attractive on the line. Pretty great:

Lisa Wade, PhD is a professor at Occidental College. She is the author of American Hookup, a book about college sexual culture, and a textbook about gender. You can follow her on Twitter, Facebook, and Instagram.