OK...I'm still catching up on posting from when I was on vacation in the Outer Banks.....
My mother, rest her compulsive Kentucky soul:

Always insisted that you should never, ever be the first in line for food at a party. She never explained what would happen if
everyone declined to be first. This caused me some awkwardness when I worked at a small college where everybody got a birthday luncheon thrown for them and you were
supposed to eat first. Couldn't do it. Not even once in the six years I was there.

Insisted that Wine was not the main beverage to be drunk with the meal. That was for iced tea or milk. Wine was sort of the "side dish" of the beverage world...So when we had wine with dinner, as she began to drink a little wine "for my health", the wineglass went to the right of the "real" beverage glass. Try finding THAT one in your Emily Post.

Repeatedly put forth her strongly held notion that nobody should ever, ever....ever, ever, ever....ever....everevereverever eat strongly scented cheeses, particularly Parmesan or any of the blue cheeses. This also applied to garlic, which was the absolute "thou shalt not" of her culinary oeuvre. (This was also the woman who loved green onions raw, when in season......ah well. Our family has never been big on consistency.)
When I was in my twenties, I spent a good deal of my time breaking this rule; still do. And she would greet me with lowered brows, a sniff of the air, and an immediate identification of what I had eaten the night before. But Mom wanted a daughter-in-law, and worried that the smell would drive away any likely candidates. Fortunately, I found a wife who loves this stuff as much as I do.