I think that some of the manners that I absorbed I manifested as a child due to fear of negative consequences if I failed to do so. If I failed to say “please” or “thank you” to others when out, I would reap a whirlwind later from my mother in private. This would usually take the form of scathing put-downs and reprimands, progressing perhaps to the “silent treatment“ as my behavior had reflected ill upon her.
Manners were kind of a one-way street for my narcissistic mother; she expected (or demanded) to be treated well, while not necessarily extending the same courtesy and respect to others. It was all about her, after all. Family members were treated the worst of all. External appearances to people on the outside mattered greatly, however, and the aura of respectability, harmony, and perfection had to be maintained…