Yes, like in the movie 'The Exorcist'. The young girl Regan is possessed by a demon. Her transformation into this possessed state involves extreme behavior that is disturbing considering she is a child. Her actions range from vulgar language to physical contortions, which makes it an extreme story in terms of a child's character going through such a harrowing experience.
In some fairy tales, there are elements that can be seen as extreme when it comes to children. Take 'Hansel and Gretel' for example. The two children are left in the forest by their parents, which is an extreme situation for kids. Then they face the witch, and their journey is filled with danger and challenges that are quite extreme for children in the context of the story.
However, in some works of literature that deal with complex human nature and social problems, sexual content may be mentioned in a more euphemistic and meaningful way to serve the overall theme, but this is very different from extreme and inappropriate sex stories. For example, in some novels that explore the dark side of society, a bit of sexual description might be used to show the decadence of a certain environment, but it is always within the framework of art and morality.
" Genius Baby, Mysterious Daddy's Ultimate Pet " was a modern romance novel. The author didn't listen to it. The story was about Tang Yi, as an unmarried mother, hoping to live a low-key and happy life. However, when the company dropped a mysterious boss, her life changed drastically. A certain someone regained his memory and returned to the country to look for Tang Yi. He then found out that he had a son. He hugged Tang Yi, acknowledging both his son and his wife. However, Tang Yi did not know him, and she knew nothing about his past. The novel was still being serialised, and the latest chapter was chapter 821.
This is a complex question. Some might think that as long as the two people involved are adults and make their own choices freely, it can be ethical. But in society, we generally promote relationships based on emotional connection and shared values rather than financial transactions. And there are also concerns about exploitation, especially if one party is in a more vulnerable position, which makes it seem unethical.