Couples that laugh together, stay together.

Published in the journal Personal Relationships, the study was conducted by University of North Carolina social psychologist Laura Kurtz, who has been fascinated for years by the idea of shared laughter in relationships. “We can all think of a time when we were laughing and the person next to us just sat there totally silent,” she told TIME. “All of a sudden that one moment takes a nosedive. We wonder why the other person isn’t laughing, what’s wrong with them, or maybe what’s wrong with us, and what might that mean for our relationship.” Read More.