If you can tell me from where this came, I’ll gladly link: So what were Romeo and Juliet feeling when their eyes met across the proverbial room? Most likely, psychologists will tell you, it was something that's not quite love. "Lust at first sight exists," explains Pepper Schwartz, a University of Washington sociologist who specializes in love and relationships. We all have certain "markers," Schwartz says--certain things that ring our love bells. These might include eye color, a type of build, or even the way someone dresses. It's hard to say how these markers develop, and why certain people appeal to us more than others, she says. But there are theories.