In some fanfictions, Snape spoon - feeding Harry could be a way for Snape to secretly train Harry to be a better wizard without the rest of the school knowing. This could involve Snape teaching Harry advanced spells and techniques that are not part of the regular Hogwarts curriculum. As a result, Harry gains an edge over his enemies and is better equipped to face the challenges that lie ahead. It also might create a more complex relationship between Snape and Harry, blurring the lines between their traditional enmity and a new - found mentorship.
In this fanfiction, it might be that Snape is forced to look after Harry due to some sort of emergency situation at Hogwarts. The act of feeding Harry a bottle could be a turning point in their relationship, leading to Snape seeing Harry more as an innocent child rather than just James Potter's son, and Harry starting to trust Snape a bit more.
One interesting plot development could be Harry's initial struggle with Occlumency. He might be constantly invaded by Voldemort's thoughts in his dreams, and Snape's harsh teaching methods only make it harder for him at first. But as he gradually learns, he starts to understand Snape's motives better, leading to a begrudging respect between them.
One interesting plot development could be Snape initially being very reluctant to take care of deaged Harry. He might see it as an unwanted burden, but as time passes, he starts to notice Harry's innocence and vulnerability, and gradually warms up to him. For example, he might start making special potions to help Harry regain his proper age more comfortably.
The significance could be that it's a way to rewrite their relationship. In the original story, they have a lot of tension, but in fanfiction, this act of spoon - feeding can show Snape in a more nurturing role towards Harry, which is a big contrast to his usual harsh demeanor.
In this fanfiction, it could also be that Harry's Gryffindor nature starts to rub off on Snape in some ways. They might have arguments about how things should be done, but through these interactions, Snape might start to see the value in Harry's way of thinking. And Harry, on the other hand, might learn some of Snape's more cautious and calculating ways, which could help him in his future battles.
Well, it could start with Severus being a vampire in secret and Harry gradually finding out. Maybe Severus initially resists the urge to feed from Harry but then some situation forces him to. For example, he might be injured and need Harry's blood to heal.
Perhaps there could be a magical object or spell involved that is causing this forced marriage. Harry and Snape might have to work together to find and break this spell. Along the way, they could learn more about each other's pasts and secrets, which could change their relationship from one of enmity to something more complex.
One interesting plot could be that Harry uses his knowledge of the future to help Snape avoid some of the bullying he endured. For example, he might warn Snape about certain Slytherins who would target him. Another could be that they work together to change some small events that have a big impact on the overall wizarding world's future. Harry might also introduce Snape to some of his future friends in a different context, like showing Hermione's intelligence to Snape much earlier.
One interesting plot could be Harry having to deal with the different social expectations placed on girls. For example, in the wizarding world, there might be different rules or attitudes towards female students in Hogwarts. He might struggle with how to act in a way that is considered 'appropriate' for a girl while still maintaining his own identity.
One possible plot development could be Harry finding a new magical family or community that accepts him wholeheartedly. Maybe he discovers a hidden magical society that has been observing him at the Dursleys and now offers him a real home and proper magical training.