"She's Leaving Home"

I was thinking about "She's Leaving Home" yester-day, and I realized that it's in 3/4.  I'm not sure if there's really anything to this, but there might be a connection between the time signature (three beats in each measure) and the three characters in the song: the titular "she" and her father and mother.  The song does also mention "a man from the motor trade," but he's not a main character and doesn't even do anything in the narrative.