What does it mean when a traveler learns he loves cock stories?If we consider this from a more general perspective, perhaps the traveler has been exposed to a type of story, perhaps folk tales or local anecdotes that involve something named 'cock' (again, with the multiple possible meanings) and has developed an affinity for them during his travels. It could be that these stories have unique cultural or historical significance that has drawn the traveler in.
How does Harry's discovery of Draco being imperioused in fanfiction impact the story?Harry's discovery has a huge impact. It forces Harry to re - evaluate his perception of Draco. He no longer sees Draco as just a bully or a follower of Voldemort. This new understanding can lead to a more complex relationship between them. It might also make the other characters view Draco differently. For example, Hermione and Ron may be more sympathetic towards Draco once they learn he was under the imperius curse. This discovery can also drive the story towards exploring the motives and identities of those who use dark magic in the fanfiction world.
How could Molly's discovery of Ron and Hermione fanfiction impact the wizarding world she lives in?The impact would be minimal in the grand scheme of the wizarding world. Molly is just one person, and fanfiction is a rather niche concept. However, if she were to make a big deal out of it, it could cause some stir among those who are close to her. For example, Ron and Hermione themselves might be a bit embarrassed or amused if they found out that Molly knew about the fanfiction. And it could also make some of the older, more traditional wizards raise their eyebrows in confusion at this newfangled Muggle - inspired idea.