There might be a lot of such fanfictions out there. However, to find them, you need to use effective search terms. Maybe adding the name of the source material (if it's based on a particular movie, book, etc.) to 'Peter gives himself stitches fanfiction' in the search bar would help. For example, if it's related to a superhero story, adding the superhero's name.
One possible theme could be self - reliance. Peter giving himself stitches might show his ability to take care of himself in a difficult situation.
One good 'Peter stitches himself' fanfiction might be found on popular fanfiction platforms like Archive of Our Own. You can search using relevant tags such as 'Peter' and'stitches' to narrow down the results.
I'm not sure specifically as there could be many different interpretations of such a fanfiction. It might be about Harry in a situation where he has to give himself stitches, perhaps after getting injured in a dangerous adventure, like a battle in the wizarding world.
Obviously, Harry would be the main character. But there could also be other characters involved in the events leading up to him having to give himself stitches. For example, his friends like Ron and Hermione might have been there before and left him in a situation where he got injured.
Another theme could be pain and endurance. Stitching oneself is a painful process, so the fanfiction might explore how Peter endures this pain and what it says about his character. It could also show his determination to keep going despite the injury. Usually, in these stories, there's also a sense of secrecy or isolation, as he might be stitching himself up alone, away from others for some reason.
Fanfiction involving such a dark topic can be quite disturbing. I don't really recommend seeking it out as it goes against the positive essence of the character. Peter Parker is typically a symbol of hope and heroism in the Spider - Man universe.
The 'Peter Parker Gets Stitches' fanfiction might be centered around the idea of vulnerability. Peter is often seen as a strong superhero, but getting stitches shows his human side. It could be about how he copes with this moment of weakness. There could be a lot of internal monologue as he sits in the hospital or wherever he gets the stitches, thinking about his responsibilities and how this injury might impact his future as Spider - Man.
There's also 'Stitched Hearts'. In this fanfic, the author creates a unique scenario where Cameron Dallas is involved in a mystery that is slowly unraveled through his interactions with other characters. The writing style is quite vivid, making it easy to visualize the scenes. It really delves deep into the emotions of the characters and how they deal with the various situations presented in the story.
Peter Parker is the main character for sure. In addition to Aunt May and MJ, there could be other characters from the Spider - Man universe. For example, Doctor Strange could make an appearance if the injury has some sort of magical or other - worldly aspect to it. Or perhaps Iron Man's influence could be felt if the story is set in a universe where they have interacted. And let's not forget the Daily Bugle crew, like J. Jonah Jameson, who might be looking for a story about Spider - Man's injury.
One popular 'Peter Parker Emancipates Himself' fanfiction might be on Archive of Our Own. You can search there using the exact phrase. There are often various interpretations in these fanfictions, some might focus on Peter's journey to independence from his traditional superhero constraints, like breaking away from the usual mentorships and forging his own path in the crime - fighting world.