Some of them could be real experiences. People often like to share stories about various aspects of themselves or others, and physical characteristics can be part of those stories. However, a lot of these stories might also be exaggerated for the sake of entertainment or to boost one's ego.
If we assume 'dick to big stories' is some sort of creative or local expression, perhaps it could mean stories that grow or expand in an unexpected way, like a story that starts small and then becomes really large in scope. But again, this is just speculation without proper clarification.
The characters in these 'Big Dick Brother' stories can also be compared. There could be strong, heroic characters who are fearless and always ready to take on challenges. For instance, a character might be brave enough to fight off a group of bandits in one story. Then, there are the more vulnerable characters, who might be the ones in need of help. These characters can add depth to the story as the heroic characters step in to protect or assist them.
In many cases, these so - called 'true' stories are a mix. They could start from a real encounter but then get embellished over time. People like to make their sexual experiences seem more exciting when sharing, so it's hard to say if they are truly 'true'.
Most literature focuses on more positive, relatable and acceptable themes. Stories about bullying are common, but this specific and rather vulgar - sounding combination is not something that pops up in traditional literary canons. However, in some alternative or shock - value - seeking independent writing, there might be something remotely similar, but it's not a widespread or well - documented area in literature.