Romantic love then develops in a characteristic pattern, beginning with “intrusive thinking.” Thoughts of the “love object” begin to invade your mind. A certain thing he said rings in your ear; you see her smile, recall a comment, a special moment, an innuendo—and relish it. You wonder what your beloved would think of the book you are reading, the movie you just saw, or the problem you are facing at the office. And every tiny segment of the time the two of you have spent together acquires weight and becomes material for review.