I had years of mechanical drawing in high school, and it wasn't until my junior year that the teacher noticed I am left-handed. He started having me create dra

I had years of mechanical drawing in high school, and it wasn't until my junior year that the teacher noticed I am left-handed. He started having me create drawings from the lower-right corner to the upper-left, while the right-handed kids drew from upper-left to lower-right. When I switched, I stopped having smudged drawings caused by dragging my hand across the completed parts of the drawings. Little things.