When preaching yesterday, I used a reference to the little angle and devil sitting on your shoulders that was a common cartoon feature in the 50's and 60's. The angel was on the right shoulder and the devil was on the left one. I pointed out as a side note that the Latin word for left is sinister, meaning on the left side, but when it was mixed with Old English synn -to do wrong/evil, in the 15th century, it became "On the bad/wrong/evil side".
The left was always considered evil or wrong in that time period. There are all sorts of stories about why this was so, from which side a knight wore his sword to hiding a dagger. The story of how shaking hands came about rises from the same "left is wrong" idea.
I pointed out in the sermon that in the 21st century we are a little more enlightened about lefties, but not a whole lot more.