Well, I'm not sure what 'bb20' specifically refers to in this context. But if it's a person or a group, they could tell stories about their adventures. For example, if it's a travel group, they might tell stories of the different places they've visited, the unique cultures they've experienced, and the interesting people they've met along the way.
It's possible that 'bb20' is a nickname for a storyteller. In that case, this storyteller could tell all kinds of stories. They might start with traditional folktales passed down through generations, then move on to modern short stories that touch on current social issues, and also share some personal anecdotes that are both funny and inspiring.
In the 'bb gun for christmas story', a bb gun might seem like an exciting gift. However, parents need to consider the age and responsibility level of the child. If the child is mature enough to handle the safety rules, it could be a great gift. But if not, it could pose risks. So it's not simply a yes or no answer.
There's no way to really tell if it's common specifically for someone named Jojo. However, in general, reading fanfiction is a popular activity among fans of many different franchises. The Jojo series has a large and dedicated fan base, so it's likely that there are fans named Jojo who partake in reading fanfiction, but we can't say for sure how common it is without more data.
Perhaps this Jojo is interested in exploring different interpretations and stories within the Jojo universe that fans have come up with. Fanfiction often takes the existing characters, settings, etc. from the original Jojo series and creates new and unique storylines. So, this Jojo might be a big fan of the series and wants to see what other fans have imagined.
It depends. Maybe there are some telltale signs or elements that suggest it's a JoJo reference fanfic, but without specific context, it's hard to say for sure.