My wife and I taught our boys to open doors for women out of common courtesy. We also taught our daughter to wait for the door to be opened for her. We also would not allow our children to refer to our friends by first name, it was always Mister and Missus or Ma'am unless they are very close friends then they were allowed to be addressed as Aunt or Uncle. When I was a assistant bank manager one of my duties was to train new staff members. Most of the branch staff was made up of young college age people who had to be trained to refer to customers as Sir and Ma'am . The average age of the customer at the bank branch I had was 65 to 70 so my customers greatly appreciated that the young people who worked there were so very respectful.