16. Continue to fold napkins in half.

Because it keeps clothing clean.
Not at all.
This is one of several dining-related etiquette guidelines that we have on our list, and it has to do with napkins. The royals fold their napkins in half after using them to wipe their hands or faces.
Maintain Half-Folded Napkins © Emily Ranquist/Shutterstock
They just use the portion of the napkin that is inside the fold to wipe. In this manner, when they place their napkin back on their lap, their clothes won’t get soiled. Dinner is a formal event, complete with ball dresses and suits, so adhering to this rule is essential.