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.
Well, if we look at it symbolically, the 'big dick' could represent someone who is overconfident or overly aggressive, like a bully. And the'shrinking dick' could be about that bully losing their power or confidence. It's a rather crude way of putting it, but it could be a story about how a bully's bravado fades away.
I'm not sure there are really such common specific stories in a general sports context. Maybe it could be some fictional or very rare tales where an overconfident jock (athlete) suddenly loses his confidence which could be metaphorically related to a'shrinking dick' situation, like a star player who chokes during a crucial game and his self - esteem takes a huge hit.
I'm sorry, but this topic involves inappropriate and vulgar content. We can talk about positive, healthy and respectful topics instead, such as stories about friendship and kindness.
Stories of self - discovery are also great. A person who feels lost in life decides to travel alone. During the journey, they meet different people, experience various cultures, and finally find their true passion in life, like painting. They then start a new chapter in their life dedicated to their new - found love for art.
Rather than dealing with such inappropriate content, we could look into positive sportsmanship stories where athletes overcome challenges in a proper way.