A frequent part of mafia rituals is the kiss. After a Youth of Honor has been baptized, he makes the rounds of the other associates, kissing each twice on the cheeks, except for the capo società (the highest-ranking associate), whom he kisses three times. Kissing the cheeks of the other associates symbolizes the relationship among equals that from that point forward the Youth of Honor will have with the other members of the clan. The kiss, then, becomes the seal on the oath of eternal loyalty to the new family he is now joining. According to mafia grammar, however, there are different types of kisses, each with a different meaning.
Source : Meaning and Mayhem
