I work part-time at a bookstore that has an excellent selection of porn books. A serious-looking girl with glasses comes in. As she fidgets and starts reading a porn book, she starts twisting her legs and gets horny! When I witness the scene, she says, "I want to do the same thing as this book..." and begs for my dick! From that day on, the serious girl's erotic desires become more and more extreme! What's more, later on, she gets hired as a part-timer and starts asking for my dick all the time!