The Music in My Head

   The other day on a trip to Wal-Mart, I parked the car and as my son and I were walking up to the store I started singing a "Phineas and Ferb" song that had been stuck in my head all day long.  

   Ty:  "Dad!  Stop singing that song!"
   Me:  "Sorry, dude.  You know that I often like to burst into song while walking through parking lots.  What's really awesome is when a full orchestra pops in to accompany me."
   *blink*
   *blink*
   Ty:  "What orchestra?"
   Me:  "You mean you don't hear music around you all the time?"
   Ty:  "No..."

   For some reason, I seem to have a soundtrack constantly running in my head.  Am I the only one?