Rockin' Jingle Bells.......

"So why does the sheep play bass?" she asked again.
"I can easily explain that," I replied, smiling
"It all started when she first picked up the instrument," I said.
"She was a natural, as most all sheep are," I continued.
"She knew almost instinctively how to walk a bass line," I said,
"And how to comp bass chords."
And she added, "You were out of cats, too, I'll bet."