Sarah, you are t alone.  I am not a teacher but my whole life has involved music.  A little lady in the church I attend (she is almot 90 /yo) is in our same catagory.  Music, music, music.  Often when someone makes a comment we look at each other and know that both of us are thinking of a song related to the comment.  Once, many years ago while working in the office at Candlewood Baptist Church (now you know how long ago that was) I was printing out information for the church on an old copy machine and was keeping rhythm in my head and apparently with my body to a song related to the rhythm of the machine.  Does that make sense?  Soon someone was laughing at me because they realized what I was doing.  It was just an unconcious reaction to the rhythm.  I bet your mom could use words to explain this much better than I.  How about it Judythe Morgan?  Up to the challenge?