My grandmother on my mom's side was VERY southern and VERY proper. Some of the gems I got from her were:

-ladies always wear a slip and stocking with a dress. No slip, no dress

-ladies always sit in a car, THEN swing their legs into the car. Getting out, a lady swings her legs out (knees together!) and then stands up. It is uncouth to climb into the car one leg at a time.

-All kinda of typical small stuff like no elbows on the table, keep your unused hand resting in your lap while you eat unless you are using a fork (using both hands), and don't wipe your mouth, only dab it with a napkin. And cloth napkins at the table only.

-denim is for field hands

-always carry a magazine in your purse---because if you are ever traveling with a group of friends, and a bunch of kids pile into one car and girls are expected to sit on boys' laps, you MUST FIRST spread the magazine on the boy's lap before sitting there.

The last one was the most bizarre, because by the time I was a teenager, seatbelts were a law and people just weren't sitting on other people's laps.

My grandmother on my dad's side was super strict religious and would often quote bible verses at us, about not adorning the outside of ourselves if we were putting on makeup or doing our hair.

-and once, she told my sister right before she got married that she should NEVER refuse her husband "relations" after she got married for any reason.