It smells like deep wet dirt when it rains in southern Arizona, where I live now. It’s a genuinely wonderful smell, don’t get me wrong. In Tennessee, though, it smells like trees are taking a shower — only you have to imagine that you feel the same way toward trees as you do your girlfriend. So imagine the way it smells when she takes a shower, but with trees. It’s how I know I’m here and that gravity exists and people love me, because the rain in Tennessee has always smelled like trees taking a shower, and it always will.