“I have been watching to see how you stood, but have not noticed anything yet. Don't forget to be a good boy… .”Tennessee state lawmaker Harry Burn received that note from his mom in August 1920. And like a good son, he subsequently changed his vote from “nay” to “yea,” breaking a 48-48 deadlock in the state’s general assembly. “I knew that a mother’s advice is always safest for her boy to follow,” Burn commented afterward, while noting it wasn’t often that a man had a chance “to free 17 million women from political slavery.”