"Hit-and-run" Relationships have become common in our society as it has grown more rootless, less tied to traditional family structures, and more accepting of casual sex. But at the same time, there arises an undercurren..."Hit-and-run" Relationships have become common in our society as it has grown more rootless, less tied to traditional family structures, and more accepting of casual sex. But at the same time, there arises an undercurrent of feeling that something is missing-a quality of intimacy.