Well, it could be that she has a strange sense of curiosity. Maybe she's lacking excitement in her own life and this strange story about the neighbor has caught her attention in an extreme way.
Perhaps she has some underlying psychological issues. For example, she might have an obsessive - compulsive personality trait that makes her fixate on this particular story about the neighbor. It could also be that there was some sort of incident or event related to the neighbor that triggered this obsession, like if there was a misunderstanding or a rumor that grew out of control in her mind.
She could try to avoid any situation or conversation that involves this story. Just cut off all the sources that remind her of it.
It could be due to her being influenced by the cultural or social environment she is in. If such stories are prevalent in her social circle or the media she consumes, she might unconsciously become obsessed with them. Another aspect could be her own curiosity about nature or biology in a rather strange or unorthodox way, where the 'big cock' aspect is just a part of a larger exploration of the natural world, although this is a less common reason.
One possible reason could be Naruto's unique power. Naruto has the Nine - Tails within him, which is an extremely powerful and mysterious force. Orochimaru, being a character always interested in power and forbidden jutsu, might be obsessed with Naruto in fanfiction because he wants to study or even obtain that power for himself. Also, Naruto's strong - willed personality and his ability to change the people around him could be fascinating to Orochimaru who has always been somewhat of an outcast in the Naruto world.
Maybe she wants to share an interesting experience. It could be something unique that happened in her life, like a travel adventure or a heartwarming encounter in the neighborhood.
Maybe the story was very inspiring or exciting. It could have elements of adventure, mystery or great achievement that attracted her.
It could be due to the fact that Naruto is always in the spotlight. Fem Sasuke might be obsessed because she wants to be like him in some ways or wants to understand what makes him so special. Also, their rivalry in the original series might translate into a different kind of intense feeling in this fanfiction, like an obsession.
Well, one reason could be the contrast between their characters. Madara is this powerful, somewhat dark and brooding figure, while Sakura is a strong - willed and kind - hearted healer. The idea of such a powerful and dark character being obsessed with someone like Sakura can create an interesting dynamic.
There are several possible reasons. Firstly, Hinata's unrequited love for Naruto in the original series is a major factor. Fanfiction provides an opportunity to rewrite or expand on that love story. Secondly, her character's growth and transformation are interesting to explore. In fanfiction, she can be given more challenges and opportunities to shine. Thirdly, the popularity of the Naruto franchise means there are countless fan - created stories. Hinata, being a well - liked character, is often the focus. The ability to create alternate universes and scenarios in fanfiction where Hinata can have different adventures, relationships, and personal growth is very alluring for those interested in her character.
One reason could be the desire for more content. The official Naruto story has limits, but fanfic can offer countless new stories. For example, she might want to see different versions of her relationships with other characters.
One reason could be his status as the Boy Who Lived. In the original story, Harry has this special aura about him, and in fanfiction, Hermione might be drawn to that in an obsessive way. Also, his bravery and leadership qualities could be factors that make Hermione overly interested in him.