What is love? Is there any one thing we call “love”? John describes three paradigms: romantic love, family love, and love for friends. Ken says that in each you take the desires and goals of the other person as your own. How can one love one's neighbor as oneself? Does love entail extra obligations? Ken introduces Noël Marino, professor at Humboldt University. Marino agrees with Ken's idea that love of people broadly is adopting their goals as your own. She says that romantic love is a difference of degree rather than a difference of kind. Do lovers complete each other? John says that it sounds dangerous to lose your own identity in a relationship.

爱你的恋人和爱孩子或朋友有什么不同?马里诺认为他们是相似的，尽管浪漫的爱情包括性欲和更大的强度。你所爱的人是否具有某种特质，就像柏拉图《会饮篇》中的例子那样，还是只是历史的偶然你爱的是一个人而不是另一个人?Marno支持爱的历史观念。随着时间的推移，爱会成为一种关系的组成部分，从而加深关系。一个人怎么能爱人类呢?爱情可能被减少为内啡肽的相互作用，这种可能性是否会削弱爱的价值?

Is everything we do out of self-love? Do we love solely out of self-love? Ken asks if we have special obligations to our loved ones, then does that interfere with our obligations towards complete strangers? How does love interact with moral theories? Most moral theories ignore love and Marino thinks this needs to be addressed. Why should we be moved by views, such as Schopenhauer's, that say that the purpose of love is solely to reproduce?

• Roving Philosophical Report(Seek to 04:30): Amy Standen interviews several San Franciscans about what they think love is.

• Sixty Second Philosopher(Seek to 49:58): Ian Shoales looks at the history of love in philosophy, from Socrates to Mill to Heidegger.