SHAKING HANDS Shaking hands is a relic of the caveman era. Whenever cavemen met, they would hold their arms in the air with their palms exposed to show that no weapons were being held or concealed. This palms-in-air gesture became modified over the centuries and such gestures as the palm raised in the air, the palm over the heart and numerous other variations developed. The modern form of this ancient greeting ritual is the interlocking and shaking of the palms which, in most English-speaking countries, is performed both on initial greeting and on departure. The hands are normally pumped five.