What was that Beatles song?

So I was watching vh1 today and they were doing this Beatles Anthology doentary. On some of the commercials for the preview of the Anthology there was a Beatles song that was played. I can't remember the lyrics but I know it had a guitar that somewhat sounded like a mandolin. The guitar sounded like something you would hear in France during a ball like back in the old days or something. And the song was talking about love. But most of their songs tend to talk about love so I dont think that narrowed it down much. Anyone know?