Why are some people able to write with both hands?

 
For most people, the brain’s left or right side is dominant. The left side of the brain controls movement on the right side of the body, while the right side of the brain controls the left side of the body. As a result, people whose brain is dominated by the
left side write with their right hands and vice versa. People with equally strong left and right brains are called ‘ambidextrous’. Those people-about I in 100 can do things like write, use scissors, and throw balls with both hands.