One weird fact, recalling this statement I made long ago in another thread:
"...one study has shown, a typical palm surface of the hand can harbour more than 150 different bacterial species, only 17 percent of which are common to both hands of the same person and only 13 percent of which are shared by different persons."
I wonder what causes those different bacterial communities on the right and left hands...
According to the Encyclopaedia Britannica:Shaking hands is a sign of peace - you hold your sword in your right hand, so if your hand is empty and shaking theirs, you're not trying to kill them.
Also, you'd traditionally wipe your bum with your left hand and eat with your right (in the absence of cleaning facilities), so you'd extend the right hand of fellowship and not the left...
"...one study has shown, a typical palm surface of the hand can harbour more than 150 different bacterial species, only 17 percent of which are common to both hands of the same person and only 13 percent of which are shared by different persons."
I wonder what causes those different bacterial communities on the right and left hands...