"Lefty" refers to individuals who predominantly use their left hand for tasks such as writing, eating, and throwing. This trait is known as left-handedness and occurs in about 10% of the population. Left-handed people may face challenges in a world designed for right-handed individuals, such as tools and equipment that are often made for right-handed use. Left-handedness is linked to brain function, as the right hemisphere is typically more active in left-handed individuals. Some famous left-handed people include Leonardo da Vinci, Albert Einstein, and Barack Obama. Despite the challenges, left-handedness is often associated with creativity and unique problem-solving skills.