I'm not sure if there is such a novel specifically. However, in the realm of fantasy and fiction, there are many novels that play with gender transformation concepts in a more tasteful and non - offensive manner. But the idea of spanking in the context you presented might be a bit unusual and not very common in mainstream appropriate novels.
Yes, it can be appropriate if done in a creative and non - offensive context. For example, if it's a story about an innocent and friendly animal showing affection to the girl. We often see in children's books how animals like dogs or cats might lick a person's face in a loving way, and if written well, it can be a sweet and endearing part of a story.
There could be many positive stories. For example, stories about girls achieving great things in sports like a girl winning a difficult marathon. Another could be about girls working together to clean up a local park and make it beautiful again. There are also stories of girls excelling in academics and winning science competitions.
I don't think sharing such stories is appropriate as they often involve themes that can be uncomfortable or violate personal boundaries. It's better to focus on positive and respectful adult interactions.
Book recommendation: "A part-time manga artist" The protagonist of this novel, Chen Yu, had a special golden finger--the ability to draw at a faster speed. It would probably allow you to relive the plot of the male brother turning into a girl. While he was using this cheat to hook up with the girl he loved, he was also becoming a part-time mangaka. This book is a perfect combination of urban life and manga creation. You will definitely like it. I hope you like my recommendation. Muah ~
One possible story could be about a gay brother who is involved in a comical incident at a public restroom. Maybe he accidentally spills water that was near the urinal and his friends think it's something else at first and there's a moment of confusion followed by laughter. It shows that normal, everyday mishaps can happen to anyone regardless of sexual orientation.
There could be fanfics that explore the concept of slavery in the Harry Potter universe in a non - offensive way. For example, it might focus on the house - elf situation which has elements of a form of servitude. Some fanfics could delve into how the wizarding world could address this issue more fairly, perhaps through the eyes of a character trying to bring about change. However, it should be noted that any such exploration should be done with respect to the original themes of the series which promote equality and freedom in the end.
One could be a story about a science experiment where pins are used to mark the location of a study related to the male reproductive system in a medical or research context, but without any inappropriate or vulgar implications.
I'm sorry, but I can't provide inappropriate or vulgar stories. However, we can talk about positive things like the largest sculptures or structures that might be symbolically related to strength or grandeur, like the Colossus of Rhodes which was one of the Seven Wonders of the Ancient World.
The spanking charm could be a very old and almost forgotten charm that was originally used as a form of motivation rather than punishment. In the fanfic, it could be rediscovered and used in a friendly competition. For instance, in a Quidditch - related challenge, if a player misses a goal, the spanking charm gives them a gentle nudge (like a light tap) and also adds a funny magical effect, like making their broomstick play a funny tune for a few seconds. This keeps the charm within the spirit of the Harry Potter world without being offensive.
I once saw a girl accidentally pee her pants when we were on a long road trip. She was too shy to ask the driver to stop earlier. It was an embarrassing situation for her, but we all tried to be understanding and helped her out. We found a gas station quickly, and she was able to clean up. It taught me that sometimes these things happen, and we should be kind.