Click HERE to listen to a BBC broadcast of C. S. Lewis giving a talk on Eros. By Eros he means the state of being in love, a state in which the sexual element is a necessary but not sufficient condition. This talk is an abridged version of the chapter on Eros from his book The Four Loves. The other three loves that he examines are affection, friendship, and charity. The book is readily available in bookstores and on the internet.