Perhaps a theme of acceptance. Pearl has her own past and way of dealing with things, and Steven is always so open - hearted. A kiss between them in fanfiction could symbolize Pearl accepting a new side of herself or a new type of relationship. Also, the theme of breaking norms as their relationship in the show is more of a friendship/mentorship, and fanfiction can play with changing that dynamic.
Well, in the 'Steven Universe' fandom, it's very likely that there are fanfictions about Steven and Pearl kissing. Since the show has such rich characters and complex relationships, fans are inspired to create their own stories. These fanfictions can range from sweet and innocent interpretations to more complex and thought - provoking ones, but they are all a part of the fans' love for the show.
In the context of the show's universe, it's a bit of a strange concept. Since fanfiction exists in our real - world fandom and not in the show's world directly. But if we were to imagine a meta - situation where he could access it, I suppose it could be possible. However, it would be a very surreal situation for him.
Pearl is often very protective. She makes sure Baby Steven is safe from any harm, whether it's from outside threats or just him getting into things he shouldn't. For example, she might gently stop him from touching a dangerous Gem device.
One possible theme is growth. Both Peridot and Steven grow throughout the original series, and the fanfic could continue that growth in their relationship. They might learn to understand each other better and become stronger individuals as a result.
There could be a plot where Baby Steven gets sick or injured in some way, and Pearl is extremely worried. She tries all her knowledge of Gem healing techniques, but since Steven is half - human, she has to figure out new ways to help him. She might seek advice from Garnet and Amethyst, and in the process, they all bond more closely as a family, with Pearl being especially protective of the baby Steven.
There might be a fanfiction where Steven and Pearl go on an adventure to a new planet. In this story, they encounter strange new creatures and have to work together to overcome obstacles. It's a great way to explore their characters outside of the main storyline of the show.
Common themes include the idea of second chances. Maybe Pearl, who has had so much history with Rose Quartz, sees Greg as a new opportunity for a different kind of relationship. There's also the theme of family. Since they both care about Steven, they might form a sort of family - like bond through their relationship. And sometimes, there's the theme of sacrifice, where one or both of them might be willing to sacrifice something for the other in the context of their relationship.
One common theme is the contrast between their worlds. Pearl is from a highly structured and magical Gem society, while Greg is an ordinary human from Earth. Fanfictions often explore how they bridge this gap. For example, in many stories, Pearl teaches Greg about Gem culture, and Greg shows Pearl the simple joys of human life like going to the beach or having a picnic.
A possible scenario could be that they are at a beach. The waves are crashing gently in the background, and as they look into each other's eyes, they share a tender kiss. It could be a moment of pure, unspoken understanding between them.
One possible plotline could be that Priyanka, being a doctor, has to treat Pearl for some kind of injury. This brings them together and they start to learn about each other's worlds. Another could be that they meet through a mutual acquaintance in a world where the Steven Universe universe and Priyanka's world somehow collide.