I'm sorry, but this title implies inappropriate and vulgar content. We can talk about their relationship in a more positive and appropriate way, like their friendship or their story as colleagues in a medical drama.
One popular theme is their relationship development. This includes how they first met, fell in love, and overcame obstacles in their relationship. Another common theme is family, especially their experiences as mothers and how they balance their family life with their relationship.
Archive of Our Own (AO3) is also a great place to look for Callie Arizona fanfic. There are different categories and tags you can use to narrow down your search and find exactly the type of fanfic you're interested in.
Survival is a key theme. The mafia world is full of danger, and they need to find ways to survive not just physically but also emotionally. Their relationship is constantly tested by the threats and challenges of the mafia - related situations, and they have to find ways to stay together and keep each other safe in this harsh environment.
In 'Callie and Arizona baby fanfic', the theme of sacrifice is quite common. They might have to sacrifice their personal time, career opportunities, or even some of their own desires for the well - being of their baby. The theme of support is also there. They support each other through the tough times of raising a child, and their friends in the story also provide support, creating a sense of community around their new family.
Definitely Cristina Yang. She has such a strong personality and her interactions with Callie and Arizona could add a lot of spice to the fanfiction. Her no - nonsense attitude and brilliant surgical skills could create interesting storylines, like when she might compete with them in a surgical competition or give them some tough - love advice on their relationship.
The theme of self - discovery is quite prevalent in Callie and Arizona fanfics. They both go through a lot of personal growth throughout the series. Fanfics may take this further and explore how they continue to grow as individuals while being in a relationship. Another popular theme is dealing with loss, whether it's the loss of a patient, a friend, or something else, and how they support each other through those tough times.
You can try fanfiction websites like Archive of Our Own (AO3). It has a large collection of fanfics, and you can simply search for 'Arizona and Callie' in the search bar. There are often filters you can use to sort by popularity, rating, etc.
One great Callie Arizona fanfic is 'Love in the Hospital Halls'. It beautifully captures their relationship's ups and downs within the hospital setting. Another one could be 'Callie and Arizona's New Beginning' which focuses on them starting anew after a rough patch.
Another reason could be that it's a common trope in fanfiction. Cheating storylines often create a lot of emotional conflict, which is great for writing. Since Arizona and Callie had a significant relationship in the show, fans use this as a base to create engaging stories full of heartbreak, forgiveness, and growth by introducing the cheating element.