Another aspect could be that it gives the readers something new and exciting. Since we are so used to the set relationships in the original 'Harry Potter' series, this kind of deviation with Snape making inuendos to Hermione can draw in readers who are looking for a fresh perspective on the characters.
In some fanfiction, it could be a plot device to build a different kind of relationship between them. Maybe the writer wants to show a gradual change in their relationship from the usual teacher - student one in the books. The inuendos could be the start of that transformation.
One possible reason for Snape making inuendos to Hermione in fanfiction could be to add an element of unexpectedness. In the original series, their relationship was mostly one of teacher - student with a bit of animosity. Fanfiction writers might use inuendos to explore a different side of their relationship, perhaps a more complex or even a slightly flirtatious side. This can make for an interesting read as it goes against the typical perception of their interactions.
In a fanfiction, Snape and Hermione might be paired up for a special project. Snape, initially hesitant, realizes that Hermione's thirst for knowledge and her ability to think outside the box could be useful. They could start off on a rocky note, with Snape being his usual sarcastic self and Hermione being defiant. But as they work together, they develop an understanding and respect for each other's skills.
It's also possible that their interaction would be filled with mystery. Snape has so many secrets, and Hermione is curious by nature. She might try to pry into his secrets, while Snape tries to keep her at bay. This cat - and - mouse game could add an interesting layer to their time in the closet.
Hermione's Veela heritage could make her more alluring and confident. In the presence of Snape, this might initially annoy him as he is used to seeing Hermione as just a studious Gryffindor. However, as time goes on, her Veela charm could start to break down his cold exterior. For example, in some fanfictions, Hermione's Veela side might cause her to be more assertive with Snape, challenging his views in a way that he can't ignore.
Perhaps in a post - war scenario, Hermione is working on a project to restore Hogwarts. Snape, who has a deep connection to the school, is initially hesitant to get involved. But Hermione convinces him. Through their joint efforts, they form an unexpected bond, sharing stories of their past experiences at Hogwarts and how they both have a love for the place despite their differences.
Snape could offer Hermione a book to distract her. Knowing her love for knowledge, a rare and ancient book about magic could draw her attention away from whatever is breaking her. It would be his way of saying that there are other things to focus on and that she can find solace in learning.
In 'Classroom Dynamics', Snape and Hermione have engaging exchanges in class. It shows how Snape, despite his gruff exterior, comes to recognize Hermione's exceptional abilities. This fanfiction is more about their academic interactions and Hermione's growth under Snape's teaching.
In fanfiction, their relationship can be a vehicle for exploring themes of acceptance. Hermione is often seen as an outsider in some ways at Hogwarts due to her intelligence and Muggle - born status. Viktor, too, might feel out of place in the more Anglicized wizarding world. When they are together, they can create a space where they both feel accepted and understood, which is a very heartwarming aspect of their relationship in these fictional stories.
It could initially cause a great deal of shock and discomfort for Hermione. She might view Snape with even more suspicion and dislike, thinking he has some ulterior motive. For Snape, he may be embarrassed by the accidental contact and try to distance himself even more from Hermione, worsening their already strained relationship.
Hermione would likely become more confident in her magical abilities. Snape's strict teaching would push her to refine her skills, making her even more proficient in potions and other areas of magic. She might also become more guarded, as Snape's influence could make her more cautious about sharing her knowledge.