Do you believe in love at first sight? We’ve seen this romantic phenomenon play out again and again in movies and love songs, and some lucky few may have even experienced it in our own lives. Here’s how the story usually goes: Two people are minding their own business, just living their lives. They may be at work, hanging out with friends, or in a crowded train. Suddenly, they lock eyes and—bam—their heart starts fluttering, their knees go weak, they might even lose self control. They are entranced, feel a magnetic pull, and boom – love at first sight.