I think that the people hidden in the elderly couple's faces is them when they were young, and that may be how they met. I think it shows that they grew old together.
Positive: we call the figure or foreground shape positive and the focus of the picture, it is often called the subject matter negative:this is usually an empty shape or space and is the background or surround of the subject matter it is possible to reverse this maxim to create an abstract effect..The negative space is defined by the edges of the positive space and the frame or border .
That country music sounds like country jam that most people liked and blue music is music that is soothing? Idk sorry if I said this wrong