Interesting marketing fact: Lefties tend to like things on the left hand side of a page, right handed folks tend to choose items on the right side.
People were asked to look at a page with two animals and asked to pick which one looked nicer or smarter or cuter, participants tended to choose the animal on their dominant side by a significant percentage.
So if you’re marketing a left handed mouse, or have a website devoted to southpaws, you might want to keep this in mind, a few changes in design elements might be useful. For instance, a left handed person might feel more inclined to click on a button placed to the left of a product vs one on the right… Just a thought.