Show off your left side! That's because a new study found that the left side of your face is much more attractive than your right side. Wake Forest University researchers took a left side and right side photo of volunteers' faces. Then, they had a group of men and women rate the photos. The result? Left side photos were rated significantly more attractive and pleasant to look at than right side ones. And eye scans backed it up. Our pupils get bigger when looking at something interesting - and get smaller when looking at unpleasant images. And researchers found that when volunteers looked at left side photos, their pupil size increased. So, why is your left side the best side? Researchers say it's because your left side shows more emotion and intensity than your right side, making you seem much more attractive and interesting.