The act of using a hollow book with a hole in the spine to give a descrete hand job.
typically for use in a library or other places with a high density of books
Guy 1: Yo dude, Sarah gave me a page turner in the mobile libraryyesterday.
An action preformed while fucking doggy style.
While pumping the girls ass, the guy licks his thumb as if to turn the page of a novel but instead inserts it in the girls ass.