Well, it might start with the boy being lost in the xenomorph's territory. The xenomorph, instead of harming him, takes him in. As time passes, the boy discovers unique abilities of the xenomorph and helps it in some way, like warning it of approaching danger from other alien species. The story could also explore how the boy's human values and the xenomorph's alien nature conflict and then reconcile.
The boy might start off as very frightened and confused. But as he spends more time with the xenomorph, he could become more confident and brave. He'd learn to rely on the xenomorph for survival and in turn, develop a sense of loyalty towards it.
In the realm of fanfiction, anything can be made possible. However, considering the nature of xenomorphs (being extremely dangerous and alien in the most literal sense), a romantic relationship between a xenomorph and a human is highly unlikely in a traditional sense. But fanfiction often bends and breaks the rules of the original lore. Writers might explore this concept by perhaps giving the xenomorph more human - like emotions or creating a unique bond between the two species through some extraordinary circumstances.
It could start with fear and curiosity. The human is initially terrified of the xenomorph but as they observe it, they notice some unique behaviors. This piques their curiosity and they start to approach it cautiously.
Xenomorph x Human Female fanfiction might also focus on the power dynamics between the two. The Xenomorph is typically a very powerful and feared creature, while the human female may be seen as more vulnerable in a traditional sense. But in these stories, she could potentially find ways to hold her own or even gain an upper hand through her intelligence or unique connection with the Xenomorph.
In fanfiction, a Xenomorph - Human hybrid male can be an extremely interesting concept. It could possess unique physical traits, like the Xenomorph's strength and the human's intelligence. Writers might explore how such a being would fit into the world, whether it would be shunned or feared. It could also have its own moral compass, influenced by both its alien and human sides.
It's a fascinating concept. The hybrid male could have the Xenomorph's acidic blood, which would add an element of danger to his character. At the same time, his human side might give him empathy. In fanfiction, he could be a hero, using his unique abilities to protect both Xenomorphs and humans from a greater threat.
Survival is a very common theme. Since xenomorphs are often depicted as dangerous predators, humans are usually fighting for their lives. Another theme is the exploration of the 'otherness' of the xenomorphs. Writers often try to understand what makes them tick.
In fanfiction, the idea of a xenomorph and a female human pregnancy is often a very dark and complex concept. It could be used to explore themes of body horror, the unknown, and the violation of the natural order. Some fanfictions might focus on the physical and psychological changes the human female would endure during such a pregnancy.
In a fanfiction about a Xenomorph Queen and a male human, perhaps the human has some sort of special ability. For example, he could be telepathic and is able to connect with the Queen on a mental level. This connection might start off as a way for the human to survive but could evolve into something more complex, like a strange form of friendship or mutual understanding. The Queen, on the other hand, could use this connection to learn more about the human world and the potential resources it offers.