"Klar found that when one or both parents are left-handed, the odds are that 20% of their children will be left-handed. (For example, if a couple has five children, chances are that one will be left-handed.) Two right-handed parents produce left-handed children about 8% of the time." this is from an article on this website (press here) This is strange because both our parents are right handed and Mike and I are both left-handed. However they define "handedness" more than just by what we write with. (I personally write with a pen). And it comes from Mom's side of the family because I have heard that a large number of our cousin on that side is left-handed and my grandfather, who was whipped into writing with the right, was originally a lefty, preferring to do tasks with his left hand. Continuing the article Klar favors genetics but other doctors do not, which goes against what I just wrote above. I happen to believe it is genetics, but here's more from the article: "In contrast to Klar's theory is one proposed by psychologist Dr. Stanley Coren of the University of British Columbia in Vancouver, Canada. Coren is the author of The Left-Hander Syndrome. He hypothesizes that all people are naturally right-handed, but due to a type of brain trauma that occurs in the womb or at birth, some people become left-handed.

The Geschwind-Behan-Galaburda (GBG) Theory of Left-Handedness, first proposed in 1987, also downplays the role of genetics. The GBG Theory proposes that certain chemical variations and hormonal changes in the womb at the time the brain is developing may lead to left-handedness. The effects of these changes may help explain why dyslexia, immune disorders, and language disorders are most prevalent in left-handers. "

Haha, I do think I have a weak form of dyslexia. I can't to this day, write "public" without wondering which letter starts it "p" or "b" and the same with "d"s. It is not only for reading but for the usage of language.

"The word "sinister" is almost verbatim the latin word for left-handed. (Dexter meant right-handed.) Through religious antipathy to the left hand, the modern meanings of these words as "evil" and "able" became more common. This has the amusing result of illuminating the meaning of the word ambidextrous -- "right handed on both sides." Even other languages suffered from this -- the word left is from an old saxon word "lyft," meaning worthless. In French, left is "gauche," also meaning clumsy."