One reason could be that they come from different backgrounds in the fanfiction. This difference might create a barrier that prevents John from loving Sam. For instance, if John is from a very traditional family and Sam has a very radical lifestyle, John may be put off.
It's possible that in the fanfiction, John simply doesn't find Sam physically or mentally attractive. Physical attraction can play a role in the development of love, and if Sam doesn't meet John's standards in that regard, it could lead to John not loving him. Mentally, if Sam's ideas and views are constantly at odds with John's, that too can prevent love from blossoming.
One possible reason is that the fanfiction distorts the original relationship between Bella and Sam in a way she finds unacceptable. For instance, if it creates a false romantic tension where there shouldn't be one.
In some fanfictions, it could be a miscommunication situation. Sam might think he's doing the right thing in a hunt, but John disagrees. So, John spanks Sam not just as a punishment but also as a way to make him see his perspective. Also, it could be related to Sam's relationship with the supernatural side of himself. John might be trying to keep Sam's human side dominant by using this rather extreme form of discipline.
One reason could be that the fanfic focuses on a different pairing for Lucy. So, to make that other relationship more plausible, the author made Lucy not have feelings for Natsu.
Since Carly and Sam love fanfiction, they probably have their favorite types. It could be fanfiction based on a particular TV series they both love, like a teen drama or a science - fiction show. They might spend hours scouring the internet for the best fan - written stories, and perhaps they even have their own favorite fanfiction authors. This love for fanfiction could also inspire them to create their own works in the future.
One reason could be the sense of power it gives them. Trampling a man can be a very physical display of dominance. It makes them feel in control.
Maybe John has different values from Sam in the fanfiction. Their personalities or goals might be so different that John can't develop feelings of love for Sam.
It could be due to a misunderstanding. For example, Percy might have done something that Annabeth misinterpreted as betrayal or insensitivity. This could have led to her feelings changing or fading away in the fanfiction.
One possible reason could be that Renesmee simply has different interests. Maybe she is more drawn to a different lifestyle or set of values that Jacob doesn't align with. For example, she might be interested in exploring the world in a more solitary way while Jacob is more about the pack and community.
Well, in the fanfiction context, Naruto may not love Sakura because he has unrequited feelings for someone else. Maybe he has a deep connection with another character that makes him view Sakura just as a teammate. Also, their personalities might not be as compatible in a romantic sense as one would initially think. Naruto is often impulsive and headstrong, while Sakura can be a bit more reserved in some ways, and this could lead to a lack of romantic attraction.
One possible reason could be that in this fanfiction, Peeta might have had a past experience with Katniss that made him lose his love for her. For example, if Katniss made a choice that deeply hurt Peeta, like choosing the Games over their relationship in a crucial moment. Another reason could be that the author wants to explore an alternative storyline where Peeta's feelings change due to external influences such as political pressure in the Capitol forcing him to distance himself from Katniss. Or perhaps, in this fanfiction, Peeta meets someone else who makes him realize that his feelings for Katniss were not as deep as he thought.