Remember being a kid and your mom lecturing you about manners? My mom was the head of the Good Manners Gestapo. “Sit up straight.” “Chew with your mouth closed, please.” “Don’t slam the doors.” “Use those ab muscles when you sit down. No plopping!” “It’s, ‘Yes, ma’am.’” “Um, please?” “Thank you.” “You’re welcome.” “Can you …