What is this love?

What is this love that I hear of from every mouth? What is this obsession with love? What is this love that makes our heart beat so, our spine tingle, our body pulse with sensation? What is this love that make who have it gush about it and those who don't scorn it? What is this love that drives us, every one of us, in every culture, in every society, making us dreamy-eyed, giving us a sweet insomnia and a bothersome restlessness, it makes us sing and dance, it gives us hope? What is this love that leads to artistic expression, that touches our hearts, that makes us listen, and gives us desire? What is this love I hear of, this love I hear of from every mouth?