Observation.

 Fan Fiction.
 Fan Fiction (most often shortened to the term fanfic) is wrote by young people. The teens write these stories about their idols. Such as Harry Potter, Sherlock Holmes and Justin Bieber. Fanfics can be about how Cody Simpson falls in love with a fan he met a the dog run or how Cody Simpson falls in love with Josh Hutcherson.
  Seriously.
  I've heard of a fanfic in which Harry Styles goes to Hogwarts and falls in love with Harry Potter.
  Dead Serious.
  And then there are AU fanfics (AU stands for alternate universe). In an AU fanfic Frodo Baggins and Samwise Gamgee can be portrayed as normal old high school students. Or Edward Cullen can be portrayed as a drug lord with an obsession with cars. In AU's really they only thing that gives a fanfic reason to tie itself to a fandom is that the name of a character is the same as the object of following in the fandom in question. So I could write a story about a girl with circular glasses named Harriet Pottering and it instantly becomes a Potterhead story.
  I kid you not.
  There are two major websites dedicated to fanfics. LiveJournal and AO3. LiveJournal is mostly bands and celeb fanfiction while AO3 is mostly subfandoms such as, The Avengers or Anime. Both sites are fan-owned and fan-runned.
  Every fandom has that one fanfic that everyone in the fandom has read and is so highly regarded that if you can't recount the entire plot backwards you are not a true fan. Apparently. For the Twihards it's Fifty Shades Of Grey. FSOG had such a wild reaction among the Twihards that it's now a published book being made into a movie. All based off of a Twilight fanfic.
   Now each fandom has a rating. G, PG, PG-13, R and NC-17. An example, Adam Lambert fans, called The Lambertinis, are rated R so the majority of their fanfics are also rated R. To be a considered a completed fanfic you must give your work a rating. Unfortunately most fandoms are rated above PG-13, making most fanfics unreadable in my case because of all the "smut" as the fandoms call "it".
  With all that said, I think fanfiction is kinda extraordinary.
  All these young people, write these novel length stories, some of which have one and sometimes two sequels. They dream up these crazy plot lines and complex webs of characters. They paint pictures of crippling pain and utter happiness. They give their characters their own feelings and share real experiences, some of which take quite a bit of bravery to publish.
  So it's just kinda amazing that these young people have this subculture in which they write these stories and publish them. They read them. They edit them. They create soundtracks for them. They recommend them to other readers/writers. And no one tells them to. They do all this by their own free will. And they enjoy it.
  It's kind of beautiful.