Do not eat like pigs and do not blow into the bowl so it splashes everywhere.
. . . drink and eat only as much as you need; be the last one to finish eating . . . Do not lick your fingers and do not gnaw bones but rather take the meat off with a knife. Do not pick your teeth with a knife but use a toothpick . . .
Do not pick your teeth with a knife!? I'm willing to bet that a lot of people cut their gums up trying to do that.