I'm not sure if there is such a specific fanfiction. Fanfiction can cover a wide range of themes and descriptions, but this kind of rather odd and inappropriate description might not be common in mainstream Naruto fanfiction.
One common theme is alternative universe stories. For example, what if Naruto was raised in a different village? Another is exploring his relationship with his parents in more depth. Also, there are fanfictions that focus on his training and how he masters new jutsus in unique ways.
The idea of a female anthro horse and 'lemon' in Naruto fanfiction can be quite complex. If we think about it, the female anthro horse could be from a different dimension or tribe within the Naruto world. The 'lemon' aspect could be her having a very passionate and unique personality. She could be attracted to a ninja who is different from her kind. Their relationship could develop in a way that shows how love can cross boundaries, whether they be species - related or cultural within the Naruto universe. But again, it should be presented in a tasteful and appropriate way.
In a fanfiction about Hagrid, the phrase could be used to describe his loyalty. Just as a horse is known for its loyalty, Hagrid could be said to be 'hung like a horse' in terms of his unwavering loyalty to Dumbledore or his love for the magical creatures he cares for. This gives a positive and family - appropriate spin to the phrase.
One possible story could be that the alpha, perhaps a strong - willed character, meets a horse and through some shared experiences, like helping each other during a storm, they become friends. Then their human friend comes into the picture and they all form a special bond. They might compete in friendly races or just enjoy long rides through the countryside.
There could be some Naruto fanfictions that might use the word 'hung' in a non - literal sense, perhaps referring to a character's determination or eagerness. But if it's a very specific and unusual combination, it might be difficult to find. You could try looking through Naruto fanfiction communities and asking for recommendations related to this specific concept.
Since 'hung lemon' is not a very clear or common concept in Naruto fanfictions, it's hard to recommend a specific one. But there are tons of Naruto fanfictions that are suitable for all ages. For example, those that focus on Naruto's training journey or his friendship with Sasuke are family - friendly and very engaging.
The horse could be a wild mustang that an alpha - type person (someone with a strong personality) tries to tame. Their friend might be a local rancher who gives advice on how to approach the horse gently. And 'Hung' could be the name of a place where they keep the horse once it's tamed, like a ranch called Hung Ranch.
As far as I know, this isn't a common theme that has produced well - known fanfictions. Most popular Naruto fanfictions tend to focus on things like character relationships, battles, or alternate storylines. However, that doesn't mean there aren't some out there. You'd have to do a deep search through fanfiction archives to find if there are any that have gained a following for this specific concept.
There could be fanfictions where this phrase is used in a more humorous or metaphorical sense. For example, perhaps a story where a character has an over - the - top amount of confidence that is compared to being 'hung like a horse' in a non - vulgar way. Maybe it's used to describe a character's bravado in the wizarding world, like when they face a difficult magical creature or a powerful dark wizard.