" I have not yet managed to understand this about the English; in Naples, if a man despises another, he spits in his face openly or insults his family, and then a fight ensues. Here, they shake one another’s hand, dine together, smile with their teeth only and wait until the other’s back is turned before striking their blow, and this agreed deception is called etiquette. "

― S.J. Parris , Sacrilege (Giordano Bruno, #3)