What is love?
爱是什么？
There are three elements in it.
有三种元素在里面。
With passion and intimacy, it is romantic love.
激情+亲密=浪漫史式爱情
With intimacy and commitment, it is companinate love.
亲密+承诺=同伴式爱情
With passion and commitment, it is fatuous love.
激情+承诺=愚蠢式爱情
With all three elements, it is comsumate love.
三者都有，就是完善（完美）的爱情。