Finding the Right Person. Some psychiatrists, such as Thomas Lewis from the University of California, hypothesize that romantic love is rooted in experiences of physical closeness in childhood—for example, how we felt in our mother's arms. These feelings of comfort and affection are written on our brain, and as adults our constant inclination is to find them again. According to this theory, we love whom we love not so much because of the future we hope to build, but rather because of the past we hope to live again. The person who "feels right" has a certain look, smell, sound, or touch that activates very deep memories.