Well, technically it was Delilah in this instance. I was driving to the accompaniment of Delilah (in the form of a Russian mezzo-soprano) singing ‘Mon coeur s’ouvre a ta voix’, from Saint Saens’ opera ‘Samson and Delilah’, with its sinuous descending scale tune. I was enjoying the composer’s wonderful skill and the soprano’s interpretation thereof when it occurred to me that I was hearing it in Saint Saens’ chosen key of D flat major. No suggestion of neighbouring D major. Samson and I were seduced by D flat major all over again.