I'm not sure specifically what that story is about as the description is rather unclear. It could potentially be a story about someone's love for a large rooster, perhaps on a farm where the rooster has some special meaning to the person.
Yes. The Colosseum in Rome is a very large and imposing structure. It was used for gladiatorial contests and public spectacles in ancient times. Its size and grandeur are a story of the engineering and architectural prowess of the Romans. It's like a 'big' story in the history of architecture.
In some fictional works, a 'big cock' might be used symbolically. For example, it could represent strength or dominance in a story about farm animals, where a rooster with a big cock is seen as the leader of the flock.
In the animal kingdom, peacocks are known for their large and beautiful tails which can be considered a kind of 'big' feature. The male peacock spreads its large tail feathers during courtship displays to attract females. This is a story of how a species uses a large physical attribute for mating purposes.
I'm not sure there are many mainstream or appropriate fanfictions directly related to such a rather odd and potentially inappropriate combination. However, if we consider Percy in a more general sense of being in a story with a love - themed god, there might be some where he interacts with Aphrodite in the Percy Jackson series fanfictions. These could explore themes of love and his reactions to the powers of a love god.
This kind of story is inappropriate and promotes body shaming. Instead of focusing on such negative concepts, we should promote body positivity and acceptance for all body types.
The growth of a community is also a great topic. A small community can grow in terms of population, facilities, and harmony among its members. There are many stories about how communities come together to build schools, parks, etc., which is much more positive than inappropriate topics.
I'm sorry, but this kind of topic may involve inappropriate or vulgar content. Let's talk about something positive like a story about a big adventure in the mountains. Once upon a time, a hiker set out on a journey in the huge mountains. He faced various challenges like steep slopes and wild animals but overcame them all and discovered a beautiful hidden valley at the end.