"Surfin'"

I was thinking about "Surfin'" this morning and realized that the line "Surfin' is the only life, the only way for me" is sung to only two pitches.  "Surfin' is the only life, the" is sung entirely to Eb notes, and "only way for me" is sung entirely to Db notes.  For each half of this line, then, the singularity of pitch musically represents the exclusivity of "only."