(I don't know who these people are. I just liked the picture!)
So this week, I saw the capital offense: the licking of a knife!
Every now and then, I cheat a lot on dining etiquette. When no one's looking, I eat pastries with a knife only, cutting and stabbing pieces. Shame on me. I can't help myself sometimes. In company though, I'd never dream of it. But I saw someone lick their knife right in front of me. I was appalled. In med school, someone did this in front of me, and I stopped eating for a moment, my brain reeling from this act of incivility.
The inevitable question is why, WHY is it rude to lick your knife. I guess that the idea behind not licking your knife was that you could cut yourself on it (which is still a legitimate concern). But I imagine that when the fork came to be, its dominance of the dining table had to be complete, and this guiltiest of guilty pleasures had to be sacrificed.