"Balladen om herr Fredrik Åkare och den söta fröken Cecilia Lind"
Or, "The Ballad of Mr. Fredrik Åkare and the sweet Miss Cecilia Lind."
It's an old Swedish ballad about an old man who falls in love with a beautiful girl, dances with her, and kisses her. Then he finds out she's actually 17 and she asks him to kiss him again.
It's a classic. A very weird classic.