It's not appropriate at all. Fanfiction is supposed to be a creative outlet for fans to expand on the existing storylines, characters' personalities or create new scenarios. But when it comes to sexual content, it objectifies the characters and can lead to a negative perception of the original work. Moreover, it may not be acceptable in a family - friendly or general community.
One way is to start fanfic contests that have themes focused on friendship, teamwork or problem - solving between Jess and Rook. This will inspire fans to write positive stories.
By having them face a common enemy. When they fight side by side against a powerful foe, they can learn to trust each other more and understand each other's fighting styles better.
One possible plot could be that Rook and Ben go on an adventure to a new planet in the Ben 10 Omniverse. They encounter a strange alien species that has a unique power. Ben tries to use his Omnitrix to transform into an appropriate alien to deal with the situation, but there are some glitches. Rook, with his Plumber skills, helps Ben figure out what's wrong and together they overcome the challenges and make new friends among the aliens.
Another theme is adventure. Since they are from a universe full of strange planets and creatures, many fanfics take them on exciting adventures across the galaxy. They might be searching for a powerful artifact or trying to stop an evil force from taking over the universe. It's all about the journey and the discovery along the way.
One great Jess Mariano fanfic is 'A New Chapter'. It beautifully explores Jess's growth after leaving Stars Hollow. It shows his new experiences in the city and how he still has a soft spot for Rory. Another good one is 'Jess's Redemption'. This fanfic delves into his attempts to make up for his past mistakes and how he tries to win back the trust of the people in Stars Hollow.
There could also be a theme of self - discovery. As they interact, both rook and ben might discover new aspects of themselves. For example, rook might learn more about his own courage through his association with ben, and ben might understand the importance of loyalty better because of rook. This self - discovery can be a really interesting theme to explore in fanfic.
In a Naruto fanfic, the rook and bishop could have really unique roles. The rook could be like a powerful shinobi with great defensive abilities, perhaps guarding a village entrance or a secret base. The bishop could be a more strategic character, using their knowledge to plan attacks and defenses. For example, the bishop might be the one to analyze the enemy's movements and come up with a plan to counter them. They could also be associated with certain clans or groups within the Naruto universe, bringing in new storylines and conflicts.
First, understand the characters of Ben and Rook well. Their personalities should shine through in the fanfic. For example, Ben's more impulsive nature and Rook's calmness. Then, use the tickling concept in a creative way, like making it a unique form of communication between them.