When you hear an old song you haven't heard or seen or even thought about for tens of years and then it comes into your life by some funny random act of happenstance and you find yourself tapping your foot and smiling pleasantly and it's like the words inherently go to your tongue like they've always been there, at the ready, hoping you'd sing them one more time.
It was kind of like him.
And you add it to your list, and him to your life, and you hope to never again overlook the existence of a harmony so engrained.