Footsteps
Has it really been twenty days? Sorry! I was moving. My books are all on shelves now. To celebrate, here's an Edo-period senryū with universal book-nerd appeal:
足音がすると論語の下へ入れ
ashioto ga/ suru to rongo no/ shita e ire
On hearing footsteps, he hides [it] under the Analects
Ōmagari Kuson 大曲駒村, in whose Great Dictionary of Senryū 川柳大辞典 I found the above, notes that "it" was "probably porn" (春宮冊子). Thanks, Ōmagari Kuson.
Avery:
I like how the punchline is one word long. That's a masterpiece of euphemism.