What do you think, what special rules of etiquette existed in Peter’s times among the nobility and the common people?

What do you think, what special rules of etiquette existed in Peter’s times among the nobility and the common people? What were the general rules?

Nobility in Peter’s times was considered the elite of society. Nobility emanated from them, good manners were required. Men had to shave thoroughly, it was not permissible to use taunts towards ladies. Respect for elders was a must. They knew the rules of etiquette, as they studied them from childhood. Failure to comply with them was unacceptable.
Ordinary people paid less attention to etiquette. They did not distinguish cutlery and ate whatever was convenient. The main rule that was observed was respect for elders. It was impossible to decipher.