I'm not entirely sure as it could be a very unique and perhaps made - up concept. It might be a fictional story where a gay character has an encounter with some sort of'monster' in a context related to impregnation, but this is a very strange and likely not a common or mainstream idea.
Yes, in some cultures there are elements of such stories. For example, in some ancient mythologies, there are tales that involve gods or supernatural beings having unusual unions with mortals, which can be seen as a form of precursor to monster impregnation stories. These often served to explain certain aspects of the world or the origin of heroes or special beings.
Fanfic stands for fan fiction, which is fictional writing created by fans. However, 'gay impregnation sex fanfic' involves inappropriate and often adult - themed content that is not suitable for general discussion.
Yes, they can be. Some people might find these stories inappropriate as they involve a very private and sexual aspect of a relationship. They may believe that such topics should be kept within the boundaries of a couple's privacy.
A story of a couple's journey through infertility treatments is also an option. It can cover their emotional roller - coaster, the medical procedures, and their hopes and dreams, without involving inappropriate content.