Smut fiction is a type of fictional writing that contains sexually explicit content. It often focuses on sexual encounters, relationships, and desires. However, it is considered a form of adult - oriented literature and may not be suitable for all audiences.
Well, a smut novel refers to a book where the focus is heavily on sexual themes and often has very detailed and graphic descriptions of sexual acts. It's not for everyone and is usually considered more adult-oriented.
I'm not entirely sure what specific 'breeding smut fanfic' is. But generally, 'fanfic' is fan - created fiction. However, 'breeding' in this context might be some sort of inappropriate or very specific and often non - mainstream theme which may involve improper or unethical content in many cases. I would not recommend exploring such content.