Facts on the people who favor the left.
Left-handedness is somewhat more common among men than among women.[
- Left-handedness is less common than right-handedness. Left-handed people are more skillful with their left hands when performing tasks. Studies suggest that approximately 10% of the world population is left.
- Ambidexterity is exceptionally rare, although it can be learned. A truly ambidextrous person is able to do any task equally well with either hand. Those who learn it still tend to favor their originally dominant hand 
- In baseball, a right-handed pitcher’s curve ball will break away from a right-handed batter and towards a left-handed batter. Historical batting averages show that left-handed batters have a slight advantage over right-handed batters when facing right-handed pitchers. Because there are fewer left-handed pitchers than right-handed pitchers, left-handed batters have more opportunities to face right-handed pitchers than their right-handed counterparts have against left-handed pitchers. Sixteen of the top twenty career batting averages in Major League Baseball history have been posted by left-handed batters. Left-handed batters have a slightly shorter run from the batter’s box to first base than right-handers. This gives left-handers a slight advantage in beating throws to first base on infield ground balls.
- Because a left-handed pitcher faces first base when he is in position to throw to the batter, whereas a right-handed pitcher has his back to first base, a left-handed pitcher has an advantage when attempting to pickoff baserunners at first base.
- In many European languages, including English, the word for the direction “right” also means “correct” or “proper”. Throughout history, being left-handed was considered negative. The Latin adjective sinister means “left” as well as “unlucky”, and this double meaning survives in European derivatives of Latin, including the English word “sinister” (only when referring to the viewer’s left of a coat of arms).
Left-Handed U.S. Presidents
James A. Garfield (1831-1881) 20th
Herbert Hoover (1874-1964) 31st
Harry S. Truman (1884-1972) 33rd
Gerald Ford (1913- ) 38th
Ronald Reagan (1911 – ) 40th
George H.W. Bush (1924- ) 41st
Bill Clinton (1946- ) 42nd
Barack Obama (1961- ) 44th
There have been forty three presidents. One did it twice. That means eighteen percent of presidents have been lefty. If the population has ten percent lefties then we elect a disproportional amount of lefties.
I also noted Harpo Marx was a lefty and not his other siblings.
There are books for lefties to teach them pretty much about everything. Lefty golf is on Amazon.
There are stores that favor lefties. And you can buy a ton of stuff on e-bay.
Me, I am a righty, as are all the relatives. But the myths about lefties living less, being less intelligent, making less money are just hogwash.