All my children & grandchildren say yes mam & yes sir. Thank you & please. I was brought up this way & have done the same with my children. Last month we went on vacation with friends from California & North Dakota. The guys from California nearly passed out when my 12 year old grandson said yes sir to them. They were totally shocked & impressed all the same. The ND kids were very polite too. Not ragging on CA kids but friends said they didn't hear it often enough there.