Well, a storyline could involve Dumbledore kissing Harry as a way to seal a magical pact. This pact could be related to protecting Hogwarts or the wizarding world from a great threat. It might also be a situation where Dumbledore's actions are misinterpreted by others in the wizarding community, leading to a lot of drama and conflict. And in some fanfictions, it could be a moment of time - bending magic where Dumbledore from the past or future comes to Harry and the kiss has some profound significance for the timeline.
Yes, there are some. You can try searching on fanfiction - specific websites like Archive of Our Own. However, this kind of plot might deviate from the original relationship in the Harry Potter series, but it can offer some interesting and creative interpretations.
In a fanfiction, Dumbledore might steal out of desperation. Suppose there was a situation where a curse was about to be unleashed on Hogwarts, and the only way to stop it was by stealing a particular ingredient for an antidote from a place where it was not supposed to be taken. Dumbledore, seeing no other option, decides to steal it. His motive here is to save the school and its students, even if it means breaking the rules.
One possible storyline could be that fem Harry has some sort of special power or ability that makes Dumbledore take her under his wing as a 'pet' in a sense of protection and mentorship. Maybe she has a unique connection to magic that he wants to nurture.
One possible reason could be a misunderstanding. Maybe Harry overheard something that made him think Dumbledore was planning something against him that he didn't understand. For example, if he heard Dumbledore discussing a dangerous mission for him without his full knowledge.
A possible reason could be jealousy. Maybe Harry sees Dumbledore getting all the praise and respect while he is the one doing all the dangerous work. So, he decides to expose some of Dumbledore's flaws to get some of that attention back.
One possible scenario could be that Harry feels betrayed by Dumbledore for some reason. Maybe he discovers some secrets that Dumbledore has been keeping from him, like the true nature of his family's past or the real intentions behind certain events at Hogwarts. So, in a fit of anger and disillusionment, he decides to ignore Dumbledore.
Well, some fanfictions might focus on Ariana's magic. Since her magic was unstable, a story could revolve around her learning to control it in a different way than what Albus and Aberforth thought was best. This could lead to a split in their family not just because of the incident with the Muggle boys but also due to differences in how to handle Ariana's powers. Or, there could be a time - travel based fanfic where a character from the future tries to save Ariana from her tragic fate, changing the course of the Dumbledore family history.
It could be that after a series of events that make Harry question his own judgment, he submits to Dumbledore's authority. For instance, if there are false prophecies or misinformation floating around that lead Harry astray. Dumbledore, with his greater experience and knowledge, helps Harry see the truth. So Harry decides to submit to Dumbledore in order to get back on the right track and protect Hogwarts and the wizarding world.
One possible scenario is when he meets an ancient and powerful magical being that has just emerged after a long slumber. Dumbledore, in his wisdom, bows to show respect for this being's age - old magic and power. Another could be in a situation where he is facing a group of powerful wizards from a different culture with their own traditions, and he bows as a sign of diplomatic respect.
In such a fanfiction, one possibility could be that Harry Potter defies Dumbledore over the use of certain dark magic items. Maybe Harry believes that Dumbledore is being too cautious and that these items could be used for good in the fight against Voldemort. For example, he might think that the Elder Wand could be harnessed in a different way than Dumbledore anticipates.