Perhaps there's a fanfiction where the humans are using bath bombs in a large bath tub they've set up near the Autobot base. Optimus and Ratchet come across this strange activity. The humans explain that it's a way to unwind. Optimus, being the diplomatic leader, decides to learn more about this human custom. He asks the humans various questions about bath bombs, like what they are made of and why they fizz. Ratchet is more concerned about the practicality but eventually gets drawn into the fun as the humans start sharing stories about how much they love bath bombs.
Well, there's a fanfic called 'Healing Hearts'. In this one, Ratchet is injured and Wheeljack is there to take care of him. It's a slow - burn story that gradually builds their relationship. The dialogue is well - written and it shows their different personalities coming together in a really interesting way. There are also some great action scenes that add to the overall story.
In TFP, both Ratchet and Wheeljack have their own fan followings. Combining them in a fanfiction gives fans a chance to see their favorite characters in a new light. Their different skillsets also play a role. Ratchet's medical knowledge and Wheeljack's engineering and combat skills can create exciting storylines, whether they're on a rescue mission or just trying to survive in a tough situation. Plus, the idea of a relationship between them adds an element of romance and emotional depth that many fans enjoy.
They could be incorporated by having the humans use bath bombs as a form of celebration. For example, when the Autobots achieve a major victory, the humans decide to have a party and use bath bombs as part of the celebration. Optimus and Ratchet are invited to join. Optimus might see it as a way to bond with the humans further, while Ratchet would be more interested in the scientific aspect of how the bath bombs work.
Another concept is a time - travel fanfiction. Bumblebee and Smokescreen accidentally get sent back in time. They have to figure out how to get back to their own time while also not changing the past too much. This could involve interacting with past versions of other Autobots and Decepticons.