I learned the meaning of love from a drunk. I once passed two drunks drinking in a gutter and overheard the following conversation between them:
Drunk #1: "I love you!"
Drunk #2: "No you don't."
Drunk #1: "Yes, yes, I do. I love you with all my heart."
Drunk #2: "No you don't. If you love me, why don't you know what hurts me?"
- Rabbi Levi Yitzchak of Barditchov