Dancing Like a Sugarplum Inside my Head

Where did it come from? Why is it there? It came from nowhere and hung in my mind billowing like clothes on the line, the words playing over and over,

a ripe jolly old elf, and I laughed when I saw him, in spite of myself. …a ripe jolly old elf, and I laughed when I saw him, in spite of myself. …a ripe jolly old elf, and I laughed when I saw him, in spite of myself. …a ripe jolly old elf, and I laughed when I saw him, in spite of myself.

…the fragment just plays, wispy and light, over and over as I take a shower, as I blow my hair, as I feed the dog, as I clean the microwave.

It isn’t Christmas. I haven’t even thought of Christmas. I even remembered my dream right before waking and it wasn’t about Christmas. I have not listened to or read the Night Before Christmas.

So can someone tell me why the right jolly old elf is ripe and why he’s dancing like a sugarplum inside my head?