Looking for a romantic relationship? Then you’ll know how important that first date can be. When falling in love, what makes us attracted to some people, and not to others? The answer will be surprising to most of us—but it wasn’t to the team of researchers led by Dr. Shir Atzil of the Department of Psychology at the Hebrew University in Jerusalem. “Connecting with a partner depends on how well we can synchronize our bodies. We specialize in studying parent-infant bonding—and we had already seen the same thing there,” she explained.