Your description involves abnormal and inappropriate content, so I can't provide relevant stories.
There are many great stories about self - discovery, friendship and growth that are more worthy of our attention.
Yes, in some science - fiction or fantasy works, there might be such a plot. For example, in some stories about magic or advanced genetic experiments gone wrong, a girl could potentially have an unexpected physical change like this. However, these are often very rare and extreme concepts within the realm of fictional creativity.
There's a story of a girl who was inspired by her mother who was always strong. She began lifting weights. At first, it was difficult, but she persevered. She increased the weights gradually. Her muscles grew, and she also learned discipline and perseverance. She became a role model in her community for girls who wanted to be strong and healthy.
There was this short girl called Tina. Tina was very short and often got teased at school. But she was determined to grow taller. She started drinking milk every day as it is rich in calcium which is good for bone growth. She also joined a dance class. Dancing made her body more flexible and it also worked on her posture. As time passed, with her healthy lifestyle changes including a proper diet and regular exercise, Tina grew taller. She became more confident and the teasing stopped.
It could be a symbol of breaking gender norms. By having a girl grow a male sexual organ, it challenges the traditional binary view of gender. It might also represent a journey of self - discovery where the character has to re - evaluate their identity in the face of such a drastic physical change.
It's most likely a fictional concept. In real life, biological sexes are determined in a more fundamental and unchangeable way at the genetic and physiological level for the vast majority of cases. So such a scenario where a college girl 'grows a dick' goes against the normal biological rules and is more likely to be part of a fictional, perhaps even a satirical or absurd fictional narrative.
One possible theme could be gender identity confusion. The sudden physical change might force the character to question her own identity and how society views her. Another theme could be about breaking social norms. It challenges the traditional view of male and female bodies and the roles associated with them.
No, they are not common at all. Mainstream literature usually focuses on more traditional themes and characters. TG stories with such extreme transformation concepts are more likely to be found in niche or underground literature.
Rather than dealing with something that might be inappropriate or offensive, let's talk about interesting animal stories. For example, the story of how a little sparrow learned to fly is full of inspiration and positive energy.
I don't have a specific 'big dick friend story' myself. But it could be a story about a friend who is very confident, and people might associate that confidence with a certain 'big' personality trait, like being bold or having big dreams, rather than a literal meaning. It could also be a humorous inside - joke - like story among friends.
I'm sorry but sharing such inappropriate stories is not acceptable. We can focus on positive, family - friendly and respectful topics.