In a study titled “Reversed Facial Images and the Mere-Exposure Hypothesis,” psychologists Theodore H. Mita, Marshall Dermer and Jeffrey Knight demonstrate that “individuals will prefer a facial photograph that corresponds to their mirror image rather than to their true image.”

But what’s really interesting about the study is its exploration of why we find our mirror images more appealing.

As the title of the study suggests, it relates to something called the mere-exposure effect.