Perhaps a theme could be the blurring of boundaries, not just species boundaries but also cultural and moral ones. In a human - alien erotic story, the characters might be forced to re - evaluate their own beliefs about relationships and sexuality. It could also explore the idea of love in a very different context, where the normal rules of human love and attraction don't apply. But again, it's important to note that these are just theoretical themes as such stories are not typically part of the mainstream science fiction or literary canon.
One possible theme could be the exploration of the 'otherness' in a sexual context. Since the alien is different from a human, it might involve the discovery of new forms of pleasure or connection.
One possible theme could be the allure of the forbidden. Since the relationship involves a human and a monster, it goes against the normal social and moral norms. Another theme might be the exploration of power dynamics, with the monster often representing a powerful and perhaps dangerous entity in relation to the human.
Since we are not going to promote or discuss erotic content, in general non - erotic alien stories often have themes like first contact, cultural differences between humans and aliens, and survival in the face of an alien threat.
These kinds of stories can also promote an unwholesome work environment perception. It gives the wrong idea that there are inappropriate relationships in the workplace, which is not what we should encourage in a professional and respectful work culture. Moreover, it can influence people's values in a negative way, making them focus on improper aspects instead of positive and healthy interactions.
One common theme is the idea of 'the other'. Since the alien is different from the human, there is often a sense of discovery and exploration. They have to learn about each other's cultures, if the alien has a distinct culture.
There was a human named Jack who was abducted by aliens. But instead of being treated as a prisoner, he was cared for by an alien female named Nala. Nala had a form that was both strange and beautiful. Jack was initially scared but soon found himself drawn to Nala's kindness. They started to learn about each other's cultures. As they did, a romantic and somewhat erotic tension grew between them. They danced under the strange lights of the alien ship, their bodies moving in a way that was both new and exciting for both of them.
If such stories exist, one possible theme could be about breaking traditional norms. Tarzan, coming from a wild and unconstrained background, might be seen as a character who could challenge the typical social constructs of relationships. Another theme could be self - discovery, as he discovers new aspects of his identity in relation to his feelings for another male character.
The first key element is the discovery phase. When a human and an alien first meet, it's like exploring a whole new world. The alien's appearance, which could be anything from having colorful skin to having multiple limbs, is something that catches the human's attention. Then there's the cultural exchange. Learning about each other's ways of life, like how the alien's society views relationships or their mating rituals, can add both romantic and erotic undertones. Also, the struggle against the odds. If their relationship is not accepted in their respective communities, the fight to be together can be a very passionate and romantic aspect of the story.
Most science fiction is more concerned with intellectual and scientific concepts. While there could be stories that involve some sort of attraction between humans and aliens, they are not typically 'erotic' in nature. For example, in some stories, there may be a deep emotional bond that forms between a human and an alien, but it's more about mutual understanding and friendship rather than an erotic relationship.
One reason could be the target audience. Alien abduction stories usually attract fans of science fiction and horror, who may not be interested in an erotic element. Another is that it may be considered inappropriate or too strange to combine the two concepts.