In some species like peacocks, male peacocks have large and elaborate tails which could be considered a form of 'huge' display feature related to attracting mates, like a young male showing off. Another example is male elk with their large antlers. These features play a role in competing for the attention of females.
Male lions are also interesting. Young male lions start to develop their manes which can be seen as a sign of their growing masculinity. Their physical features and the way they present themselves, like a display of strength and dominance, can be compared to the idea of a young guy with some sort of impressive physical trait. The mane is not exactly like a 'huge cock' but in the sense of being a prominent feature for attracting mates and showing their status.
In the animal kingdom, peacocks have large and elaborate tails which could be considered in a sense like a 'huge' feature. Male peacocks display their magnificent tails to attract female peacocks during mating season. Another example is the moose. Male moose have large antlers that are quite impressive. These antlers are used for various purposes including competing with other males for mates.
In Greek mythology, Hercules was a young hero known for his great strength. His physical prowess could be related to the idea of having some sort of 'huge' or impressive quality. He performed twelve labors which demonstrated his power and masculinity from a young age.
The frigatebird also has an interesting story related to a 'huge' feature. The male frigatebird has a large red throat pouch. During the mating season, they inflate this pouch to an impressively large size to attract females. It's a crazy and unique part of their reproductive behavior story.
The peacock is known for its large and magnificent tail feathers, which could be considered a 'huge' and impressive feature. There are stories of how the peacock uses its feathers to attract mates. It spreads them out in a grand display, showing off its beauty and size.
In the animal kingdom, some species might seem to have behaviors that could be misconstrued as 'cheating'. For example, female birds may sometimes mate with multiple males. But this is often more about ensuring genetic diversity for their offspring rather than what we consider 'cheating' in a human moral sense. There are also some fish species where females may accept sperm from different males during spawning, which is a natural part of their reproductive strategy.
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.
Another example is the moose. Moose have large antlers. While antlers are often associated with mating displays in many animals, in the case of moose, their large antlers also help them in other aspects of survival. For example, they can use their antlers to clear snow from the ground to reach the plants they eat during winter. Their antlers grow every year, starting from a small base and developing into these large and impressive structures.
Rather than focusing on the inappropriate aspect in the phrase, if we consider a young man with great potential or strength metaphorically as 'huge' in a positive sense, there could be stories of young men achieving great things in sports, like a young athlete breaking records in track and field through hard work and determination.
Sharing or seeking such stories involving young teens in any inappropriate context is unethical and violates moral and often legal boundaries, so there should not be such stories in proper literature.
There are many other interesting and positive topics to discuss, like adventure stories or success stories.