Yes, there might be some fanfiction with this theme that is written in a non - offensive and family - friendly way. It could focus on Sirius Black disciplining Harry Potter in a more light - hearted or mentoring - type of situation rather than anything inappropriate.
One possible plotline could be that Harry has done something dangerous in the wizarding world, like sneaking into the Forbidden Forest without permission. Sirius, as his godfather, decides to give him a mild spanking as a form of discipline while also explaining why his actions were wrong and how they could have put him in great danger.
It could develop in a complex way. The spanking incident might initially create tension between them. Harry could be angry or resentful towards Sirius at first.
I'm not entirely sure specifically what that particular fanfic is about as there could be many interpretations. It might be a story where Sirius has some sort of disciplinary or perhaps an unexpected interaction with Harry within the context of fan - created Harry Potter lore.
One possible scenario could be that Sirius Black spanks Harry as a form of discipline for some dangerous or disobedient behavior that Harry has engaged in within the context of the fanfiction's plot.
The 'Harry Potter' books are set in a magical world full of its own stories, prophecies, and secrets. Sirius is a complex character with a lot on his plate. He has to deal with his family history, his time in Azkaban, and his loyalty to his friends. Fanfiction is a form of creative writing by fans outside the original story. Sirius doesn't have the time or the inclination within the context of the story to be reading fanfiction. His life is too filled with real magical drama and danger.
I'm not sure if it's popular. It's a rather niche and unusual concept, so it might not have a wide following. But in the world of fanfiction, there are always small groups of people interested in unique and out - of - the - ordinary ideas.
I'm not aware of any such fanfiction. Spanking in the context of the Harry Potter world seems rather uncharacteristic and inappropriate for the general themes of the series. Fanfiction usually focuses on more positive interactions, adventures, or romantic relationships among the characters.
This kind of fanfiction has several implications. Firstly, it's a deviation from the original themes of the series which focus on heroism, sacrifice, and the power of love. Secondly, it can be considered disrespectful to the characters as they are portrayed in the books. The relationship between Draco and Harry is one of rivalry, but in a more traditional magical context, not something so outlandish as this. Thirdly, it may not be well - received by the majority of the fandom who prefer fanfictions that stay true to the spirit of the original work.