Hand shake

A hand shake is an expression where two people clasp hands with each other and shake them together as a gesture of goodwill and friendship.

Empath: The Luckiest Smurf stories
In the EMPATH: The Luckiest Smurf story series, hand shakes are considered forbidden in Psychelia, as even Psyches wearing gloved hands cannot engage in it due to its perception of being a rather sensual and savage form of communication. Empath learned not to fear hand shakes during his first visit to the Smurf Village, and became accustomed to doing the same to whoever he greets when he is not in Psychelia.