Oh go on - smile! This has to be one of the most liquid, languorous songs ever. It is one of those songs you just unconsciously sing along to - in my respect out loud. I have to do that or be left with it in my mind all day.
(On a more sombre note Nat died in 1965 when Natalie must have been only 14-15. One of my sisters-in-law recently died of lung cancer through smoking so I relate. )