The heartbeat. Have you ever lain with somebody when your hearts were beating in the same rhythm? That’s true love. A man and a woman who lie down with their hearts beating together are truly lucky. Then you’ve truly been in love, m’ boy. Yeah, that’s true love. You might see that person once a month, once a year, maybe once a lifetime, but you have the guarantee your lives are going to be in rhythm. That’s all you need.
Bob Dylan, Malibu 1978