Well, in the world of fanfiction, there are various genres and themes. However, this doesn't seem to be a regular one. Fanfiction is mostly about exploring relationships, new adventures of known characters, or alternative universes related to the original work. The given phrase doesn't really fit into any of the common fanfiction molds.
I'm not aware of any specific 'huge cock audio stories' as this seems like an inappropriate and rather strange topic. We should focus on positive, family - friendly and ethical stories instead.
In the animal kingdom, male deer grow large antlers. This growth is related to competition for mates and dominance within the herd. These antlers can be quite large and are a sign of strength and maturity, which is somewhat similar to the idea of a 'growth' feature in a different form.
Rather than such improper topics, we could talk about stories of young guys in volunteer work. There are many young people who are devoting themselves to helping others in poor areas or in environmental protection projects. These stories are inspiring and can set good examples for others.
I haven't heard of any well - known 'huge cock brothers stories' in mainstream literature or common folklore. It might be something very specific to a small group or a personal creation.
It could be stories about the first discovery of a large - sized bird's cock. Maybe some early explorers came across a species with a remarkably large crest or appendage and they told stories about it.
In mainstream science fiction, there are no such vulgar depictions. Science fiction usually focuses on concepts like advanced technology, different cultures, and exploration. For example, in 'Ender's Game', the focus is on military strategy against an alien race in a more intellectual and ethical context.