Regular readers know of my musical obsessions. I get into a song, a record, an artist, and listen to basically nothing else for days or weeks.
I've been reading Nick Hornby's Songbook and he has talks about this behavior (which he's prone to as well) in the book:
Dave Eggers has a theory that we play songs over and over, those of us who do, because we to "solve" them, and it's true that in our early relationship with, and courtship of, a new song, there is a stage that is akin to a sort of emotional puzzlement.
Well I am glad there's actually a theory about this. Makes me feel better.
BTW - the book is great, if you love songs and obsess about them.