No way. Fanfics are supposed to be a creative expansion of the original work, but when it comes to 'harry potter harem smut', it not only violates the intended audience of the Harry Potter franchise but also the general standards of good taste. It can have a negative impact on the perception of the Harry Potter brand and can also make the fan community seem less respectful and more focused on inappropriate aspects.
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.