In the 'Draco steals Jarrys underwear fanfiction', it could be that Draco is being controlled by a spell or some dark magic. He has no choice but to steal Jarrys' underwear, and this sets off a chain of events in the wizarding world. Jarrys then has to figure out how to get his underwear back and break the spell on Draco.
It could be an amateur writer who is just having fun with the characters. Maybe someone who really likes to create out - of - the - box scenarios involving these two characters.
One possible plotline could be that Draco steals Harry's underwear as a prank. He might do it to embarrass Harry in front of their classmates at Hogwarts. Another could be that Draco steals it because he has some strange fascination with Harry and it's a way for him to have something of Harry's. Or perhaps it's part of a dare within the Slytherin group that Draco is a part of.
Well, it could be that Draco steals Harry's glasses as a prank. Maybe he wants to embarrass Harry in front of their classmates. He might hide the glasses in a secret place in Hogwarts, like in an old unused classroom, and Harry has to search for them while dealing with his blurry vision.
I don't think it's common at all. Fanfiction usually delves into the deeper emotional and plot - related aspects of the original story. Themes like friendship, love, and the fight against evil are much more prevalent. Stealing underwear is such a specific and rather unorthodox concept that it's likely to be a very niche and not commonly found type of fanfiction within the Harry Potter fandom.
One possible reason could be to annoy Harry. Draco is often portrayed as a bully in the Harry Potter series, and stealing Harry's glasses is a way to make his life difficult. It could also be a power play, showing that Draco can take something important from Harry.
If Draco steals Hermione from Ron in fanfiction, it might show a different side of Hermione. She might be attracted to Draco's intelligence in a different way than Ron's loyalty. This could lead to new magical adventures where Hermione uses her knowledge in a more Slytherin - like way, influenced by Draco. It could also make for some interesting interactions between the Gryffindors and Slytherins, as now there's a connection between them through Hermione. The story could explore how love can cross house boundaries in a more extreme way than what we see in the original books.
It could be about Draco having some deep self - reflecting moments while in the shower. Maybe he's thinking about his past actions at Hogwarts and how he wants to change.
Maybe it could be about how Draco's slobbish habits annoy his friends or family in the fanfiction world. For example, he might leave his things all over the place in the Slytherin common room, causing chaos and getting into little squabbles with his housemates.
One possible motive could be that Draco wants to annoy Harry. Stealing his glasses is a petty way to get under his skin. It's a simple act of mischief that Draco might think is funny. Another reason could be that Draco is jealous of Harry. By taking something so important as his glasses, he feels like he has some power over Harry.
Maybe Harry steals Hermione's Time - Turner because he has some desperate plan to go back in time and fix a big mistake. For example, he might want to prevent the death of a loved one, like Sirius. He could think that Hermione's Time - Turner is his only chance to do so.