Did you ever wonder where  the tradition of  shaking hands came from? 

In early times, people carried weapons in their right hands.

When someone wanted to show another that they wished to be friendly, they extended an empty right hand showing that it held no weapon.

To make sure that neither could suddenly draw a weapon, they grasped each other’s hand firmly until sure they were in agreement.

The actual shaking of the hands may have been for the purpose of dislodging any hidden weapons.

STILL won’t chalk a bone-crushing shake up to a bad gene re-surfacing, but if only tactics,  and weaponry were this simple today.