1986年心理学家Robert Sternberg出版了一本名叫"爱的三角理论"用几何的关系来描述爱。根据他的理论,爱可被划分为三个组成部分: 1.亲密(Intimacy)– which encompasses the feelings of closeness, connectedness, and bondedness 2. 热情(Passion)– which encompasses the drives that lead to romance, physical attraction, and sexual consummation 3. 决定、承诺(Decision/Commitment)– which encompasses, in the short term, the decision that one loves another, and in the long term, the commitment to maintain that love