There could be themes of growth and change. Maybe the child reader has an impact on Eyeless Jack, making him less of a menacing figure. Or perhaps the theme of discovery, where the child discovers the secrets of Eyeless Jack's existence and he discovers new emotions through the relationship with the child. However, it's important to remember that this is all within the realm of fanfiction and can vary greatly from one story to another.
One possible theme could be protection. Eyeless Jack might be depicted as protecting the child reader from the horrors of his world. Another theme could be a strange sort of friendship, where the child is not afraid of him and he is intrigued by the child's innocence.
Yes, there are some. However, it's important to note that such pairings can be a bit controversial due to the nature of one being a child in the pairing. Some platforms might not allow or might regulate this type of fanfiction strictly. You can try looking on some fanfiction - dedicated websites, but make sure to abide by their rules and ethics.
I'm not really into this kind of 'lemon' fanfiction which often contains inappropriate content. However, generally speaking, in such a fanfiction, it might involve a very specific and often fictional relationship between 'eyeless jack' and the reader. It may explore their interactions in a rather unique and sometimes dark or edgy way, but this kind of content is not suitable for all audiences.
A third common theme could be the idea of redemption or lack thereof. Given their often - cruel and violent natures, some fanfictions might explore if they are capable of any form of redemption. Or perhaps they are so far gone into their dark ways that there is no hope for them. These themes add depth to the fanfictions and make them more than just simple stories about two spooky characters. They can also touch on themes of morality in a very unique and often disturbing way, as the Creepypasta world has its own set of 'rules' when it comes to right and wrong.
One common theme is the exploration of their dark natures. Since both characters are from the horror genre, fanfictions often dig deep into how their 'evil' sides interact. For example, they might show how their methods of causing fear or harm are different yet similar in some ways.
There's 'A Chance Encounter'. In this fanfiction, the writer does an amazing job of portraying the initial fear of the reader towards Eyeless Jack and then how that fear turns into something more complex like curiosity and eventually a sort of friendship. It's a story that really draws you in with its unique take on their relationship.
The mystery. Eyeless Jack is a very mysterious character. When paired with the reader in fanfiction, it allows for a lot of exploration of the unknown. Readers are drawn to figure out how the relationship will develop between an ordinary person (the reader) and such a strange and dangerous being.
One common theme is the exploration of their dark natures. Since both are Creepypasta characters, the fanfics often delve into their spooky and sometimes violent tendencies. Another theme could be an unlikely alliance. They might be forced to work together in a story, which leads to an interesting dynamic between them.
Survival is also a big theme. In the dark and dangerous world they live in, they have to rely on each other to survive against other threats. For example, there could be rival groups or supernatural entities that they need to fend off together.
One common theme is the exploration of their relationship in a dark and often supernatural setting. Given their 'creepypasta' origins, there's usually an element of horror or the macabre involved.
A prevalent theme is the concept of redemption. Eyeless Jack has his dark side, and Sally has her own traumas. Fanfictions might show how they can help each other find a path towards redemption. Also, friendship or a deeper relationship is a common theme. They often start from a place of curiosity about each other and develop a bond over time. This can be seen in many fanfictions where they gradually learn to trust and rely on one another.