In the 'Harry Potter' fanfic where Harry has to wear a diaper, what could be the possible reasons for such a strange plot device?

Maybe it's a dare. In the wizarding world of the fanfic, there could be a bet or a dare among students that led Harry to do this. It's a way to show his bravado and willingness to take risks, even if it means wearing a dress for Draco.

One possible plot could be that Harry was seriously injured in a dark magic attack. The feeding tube is a result of his inability to eat normally due to the damage to his body. He has to struggle not only with the physical pain but also with the stigma in the wizarding world where such a medical device might be seen as a sign of weakness. Meanwhile, his friends try to find a magical cure to get rid of the need for the feeding tube.

Maybe it was a spell gone wrong. A misfired charm could have transformed his shoes into high heels.

It could be a story where a spell goes wrong and Harry is turned into a baby again. The plot might revolve around his friends trying to reverse the spell while Harry is stuck wearing a diaper and having to rely on them completely. There could be a lot of comical moments as his friends struggle to take care of him in this state, and Harry tries to convey his thoughts and memories through baby - like actions.

The fanfic could also be about how Harry's past experiences shape his parenting. Given his own difficult childhood, he would be extremely determined to give his baby a loving and secure environment. He might teach the baby about the importance of friendship and courage from a very young age, and the baby could grow up with a strong sense of justice, much like Harry did.

It could be a magical time - traveling device. Maybe it allows Harry to go back in time to change certain events in the wizarding world, like preventing some of Voldemort's early atrocities.

A plot might be about Harry's child struggling with the pressure of living up to their father's legacy. At Hogwarts, they constantly feel compared to Harry. But then, they find their own niche in the wizarding world by being really good at potion - making. They enter a big potion - making competition and end up using their skills to save the day when a dark potion goes wrong and starts affecting students. They prove that they can be great in their own way, not just because they are Harry Potter's child.

One possible reason could be a misunderstanding. Maybe Lupin did something that Harry misinterpreted as betrayal or negligence. For example, if Lupin was forced to keep a secret from Harry for his own safety, but Harry found out in a way that made him feel deceived.

One reason could be to create a unique and unexpected story. By introducing a non - magical, real - world illness like lung cancer into the magical world of Harry Potter, the author can explore how the characters would react. Another reason might be to show the contrast between the muggle world, where such diseases are common, and the wizarding world, which has magic to deal with most problems. Maybe the author has some personal experience related to lung cancer and wants to incorporate it into a story they love.

The bottle could be a magical potion bottle. Maybe it contains a special potion that Harry needs to use to solve a mystery or defeat a dark creature. For example, it might be a potion that allows him to see through illusions in a hidden chamber.