It's funny how you think of popular culture like songs and movies as being so important and epitomizing of a moment in time, but in reality it may not carry over in history the way you expect. Joan really likes Billy Eckstine's version of "You're So Understanding," and clearly it was a radio hit, but trying to find that version of the song, or any other version, was a challenge! Below you can listen to Dean Martin's version and try to imagine what it would have sounded like in Billy Eckstine's voice:
You're So Understanding by changela
Most of us know the song "Take me out to the ball game," but it's funny to imagine the time when the movie from whence the song comes was a new release. Here, you can view a number from the film:
On a personal note, having had an aversion for popular music myself, I was amused to discover that Sal clearly had a disdain for the hits of his day, and preferred a style that Joan refers to as "hill billy". I do wonder what she meant by that! This letter reflects Sal's dry sense of humor -- clearly he wasn't afraid to make jokes about his sweetheart's mother!