First of all as an older lady raised for the most part in the southern part of the US.I gat punished every time I did not respond with "yes maam or Sir' to anyone older than myself. As I grew this was extended to employers, teachers, bosses, and customers and anyone else whom I respected. As a newbie in the lifestyle several mentors and friends who are Doms have told me that all Doms should be called 'Sir" except for your master who will tell you what he prefers.