Muslim left handedness is a very potent cultural phenomenon.

The left hand is reserved for wiping oneself after defecation.
The right hand is reserved for eating.
Offering someone your left hand is tantamount to an insult.

In the west the right hand is most often used for wiping and then we shake hands almost exclusively with the right.



Playing violin is an interesting example of the left hand being reserved for the most minute precise movements to produce the exact tonal increments and intervals while the right hand is relatively stationary as the arm acts as the breath behind the music.