"Why is a raven like a writing-desk?"

"Why is a raven like a writing desk? They are both so full of poetry, you see. Darkness and whimsy, nightmares and song."

"Why is a raven like a writing desk? Because they both have quills dipped in ink."

"I've become rather fond of fools."

"Why is a raven like a writing desk? You see, they can each produce a few notes. Though admittedly, the notes tend to be very flat."