What a load of rubbish, men didn’t wear button up shirts in the old days, and when duelling the shirts were tied with cord or ribbon like ties on the shirt; buttons were not used in mens shirts until 1896 and that was polo player’s shirts. Gentlemen wore white shirts with cravat type ties well into the Victorian era. Then the shirt styles started too change and ties also changed. Buttons on jackets or coats go back centuries though.
As for Napoleon, he was a Freemason; giving the hidden hand gesture and you will notice many famous men doing such a pose, Albert Pike, Abraham Lincoln and even the current pope. Then there is the hand resting on the outside of the jacket, declaring allegiance to the goddess, Isis, Hathor, Rhea or whatever name you want to use, it’s still the same entity.
One possibility for right hand versus left hand could be because the male side of the body is the right hand side and the female side of the body is left. That is very common in secret societies and esoteric circles, even displayed in photography such as wedding photos or family portraits. So this article just seems to be dreamed up without proper knowledge.
