“While I know I can’t control it, what I ultimately hope to recall about my late-in-life father is not his nagging or his toes but, rather, his fingers, and the way he snaps them when listening to jazz. He’s done it forever, signifying, much as a cat does by purring, that you may approach. That all is right with the world. “Man, oh man,” he’ll say in my memory, lifting his glass and taking us all in, “isn’t this just fantastic”