No, it is completely inappropriate. Any form of sexual content involving students is unethical and goes against moral and legal boundaries. Fanfiction should focus on positive, legal, and ethical storylines.
The main ethical issue is the exploitation of a vulnerable group (students). It promotes an immoral and inappropriate relationship which is not acceptable in society.
There are many great Harry Potter fanfictions out there that focus on things like the characters' magical adventures, their growth as wizards, or how they deal with the challenges in the wizarding world. We should encourage and support those kinds of fanfictions instead.
There are numerous alternatives. For example, fanfictions that focus on the friendship between Harry and Draco. They could start off as rivals at Hogwarts but gradually come to understand and respect each other. Another option is fanfictions that explore the different houses' relationships, like how Gryffindors and Slytherins can work together against a common threat.
No. Writing fanfiction that involves sex toys in relation to Harry Potter is highly inappropriate. Harry Potter is a beloved children's and young adult series, and such content goes against the spirit of the original work and is also not suitable for public consumption.
There are many fanfictions out there with all kinds of themes and scenarios. However, this kind of theme often goes against the original spirit of the Harry Potter series which is mainly about good vs. evil, friendship, and self - discovery. So, it's not a very common or positive - themed fanfiction, and I don't really recommend seeking out such content.
Another place could be Fanfiction.net. However, the tagging system there might not be as precise as on AO3. But it's still worth a shot. Look for the relevant character names in the search bar and browse through the results. Some fanfic authors also post about their works on social media platforms like Tumblr or Twitter, so you could search there too. Maybe search for '#fem Harry #Moony #fanfiction' on Twitter for example.
As lemon fanfiction involves inappropriate content, I can't discuss its characteristics in the context of that. But generally in regular fanfiction about Harry and fem Draco, a characteristic could be the exploration of their personalities in new ways. For example, how a female Draco might have different interactions with Harry compared to the male Draco in the original story.
Another issue is that it can be considered unethical. These types of fanfiction can make some readers uncomfortable, especially those who prefer to stay true to the original spirit of the story. It also may not be suitable for younger audiences who are fans of the Harry Potter series.