A while back I was at an etiquette dinner and I learned a lot of weird rules. My favorite was this- it's not polite to be the first one to start eating, even if everyone is at the table and already has their food. So the manners lady told us, "Never be the first one to eat." That's great and all, but what if everybody followed that rule? Nobody would ever eat.
So next time your wife or mom asks you if it would kill you to have some manners, you can tell her yes.