Singing before breakfast is a forewarning of a fight with a neighbour- if the neighbour is trying to sleep late.

Shaking hands across the table means that two parties are lazy.

Throwing salt over the shoulder is likely to give the impression that the man who throws the salt has dandruff.

Thirteen at a table is unlucky when the hostess has only twelve chops.

Fashion exists for women with no taste, etiquette for people with no breeding.

He had the kind of handshake that ought never to be used except as a tourniquet.

You can deny all you want that there is etiquette, and a lot of people do in everyday life. But if you behave in a way that offends the people you're trying to…