Enjoyable conversations rarely follow a straight line of constant agreement, nor do they jump randomly from one unrelated remark to the next. According to a new study published in Science Advances, more rewarding chats tend to show a stronger version of a mathematical pattern known as “pink noise,” in which speakers align on a topic, drift apart to bring in fresh ideas, and reconnect. This give-and-take was linked to greater enjoyment among both strangers and friends, a deeper sense of…