One common theme is the struggle against society or the norms. For example, if it's a story about a mermaid and a human, the mermaid has to go against the rules of the underwater kingdom to be with the human. Also, the theme of discovery is often there. The characters discover new things about themselves and their feelings through their relationship. They might have thought they were one way before the relationship, but the love changes them and makes them realize different aspects of their personalities.
One common theme is the exploration of forbidden love. Since it's slash fanfiction, often the relationships are between characters that might not be expected to be together in the original series, so there's that element of the relationship being against the norm.
In Smallville slash fanfic, a frequent theme is the transformation of relationships. It could be from friendship to something more romantic or a shift in the power balance. Also, the theme of secrecy is common. Since their relationship is not part of the mainstream story in the show, the characters often have to keep it a secret. And there's the theme of sacrifice. Characters may sacrifice their own desires or goals for the sake of the relationship, which adds a layer of depth to the stories.
One common theme is loyalty. In many Adam 12 slash fanfictions, the characters' loyalty to each other is emphasized, whether it's in the face of danger or in their personal lives. Another theme is trust. Since they are partners, the trust they have in one another is often explored in these fanfictions.
In 'lotr slash fanfiction', a recurring theme is the idea of forbidden love. Given the cultural and social structures within Middle - earth, relationships that deviate from the norm, like a relationship between two male characters from different races or social standings, are often explored. This adds an element of tension and drama. Another common theme is the power of love to overcome differences. Whether it's differences in race, like an Elf and a Dwarf in a relationship, or differences in personality, love is often shown as a force that can bridge these gaps.
One common theme is the idea of redemption. Loki often has a journey of self - discovery and trying to be better, especially in relation to Tony. Another theme is the power of understanding. They are both complex characters, and fanfictions often explore how they come to understand each other on a deeper level.
One common theme is redemption. Both Snape and Sirius have complex pasts with things they need to atone for or be redeemed from. In many fanfictions, their relationship becomes a catalyst for this redemption. For example, they might see the good in each other that others don't, which helps them on their paths to becoming better.
Power struggles are a common theme. In these fanfictions, Harry is often in a situation where he has to fight for power within the mafia hierarchy. Another theme is loyalty. Characters have to decide where their loyalties lie, whether it's to their mafia family or to their newfound relationships. And of course, there's the theme of forbidden love which is related to the slash aspect.
The theme of trust is also very prevalent. In many 'starsky and hutch slash fanfic', they trust each other with their lives, and this trust is a foundation for their relationship. It's often shown how this trust can lead to a closer, more intimate connection between them. For example, in some stories, they rely on this trust during dangerous situations which then deepens their bond.
Another theme is the struggle with their vampiric nature in the context of their relationship. How their immortality and unique vampire qualities affect how they interact and love each other. For example, some fanfictions explore how they deal with the concept of time and change over the centuries.
One common theme is power dynamics. Zeus is a powerful god and Percy has his own set of powers. How they balance and interact with each other's power is often explored. For example, in some fics, Percy challenges Zeus' authority which leads to a whole new relationship dynamic.