Another common theme is growth. Their relationship can be a catalyst for their individual growth. For example, Butters might become more confident through his interactions with Kenny, and Kenny might become more empathetic towards Butters. This is often shown in fanfics through different story arcs.
One common theme is the exploration of forbidden love. Since they are both male characters in the South Park universe, their relationship might be seen as unconventional by some in the fictional setting. Another theme could be the power dynamics, like Kenny being more street - smart and Butters being a bit more sheltered, so there can be a play on who has more influence in the relationship.
A theme that is sometimes explored is the idea of breaking out of the expected norms in South Park. Kenny and Butters might go against the typical behaviors or roles they are assigned in the show and create their own unique relationship that challenges the status quo.
Another common theme is adventure. They might go on some wild adventures together in fanfics, like exploring a mysterious part of South Park or getting involved in some kind of mystery that only they can solve.
Kenny is known for his orange parka that he almost always wears, and he has a bit of a wild side. Butters, with his blond hair and sweet nature, provides a contrast. In the fanfic, their personalities are usually explored more deeply, showing different aspects of their relationship, like Kenny's protectiveness towards Butters or Butters' admiration for Kenny.
One common theme could be friendship evolving into something more. They might have adventures together and through those shared experiences, their bond deepens in the fanfiction.
A common theme in Butters x Kenny fanfiction is growth. Since they both have distinct personalities, fanfictions might show how they help each other grow. For example, Butters could learn to be more assertive from Kenny, and Kenny could learn to be more empathetic from Butters. Also, humor is a big part of it. Given South Park's nature, the fanfictions usually have a lot of comical situations involving the two characters.
I'm not entirely sure what specific 'kenny x butters lemon fanfiction' you're referring to. However, in general, such fanfiction might explore the relationship between Kenny and Butters in a unique way. It could involve their friendship, adventures they go on together, or how they support each other in the South Park universe.
Growth is also a theme. Fanfics might show how Kenny and Kyle grow as individuals while also growing in their relationship with each other. They could learn new things about themselves and each other as the story progresses.
Another theme could be self - discovery. As they interact with each other in the 'kenny x kelly fanfic', they also learn more about themselves. Maybe Kenny discovers his hidden talent for painting because Kelly encourages him to take an art class. And Kelly might realize she has a more sensitive side when Kenny shares his past traumas with her.
One common theme is friendship development. They might start as just classmates or rivals and gradually become closer friends. For example, a story could show how they overcome their differences over time.