I'm not aware of any specific works that would be centered around 'animal on animal sex stories' in a non - scientific context. This kind of topic is not something that is typically explored in general reading materials. We usually focus more on positive aspects of animal relationships like cooperation, parenting in animals, etc.
In modern literature, the presence of dirty sex stories is a controversial topic. On one hand, some may argue that they are inappropriate as they can be seen as vulgar and violate moral and ethical norms. However, others might say that if they are used in a context to explore complex human relationships, sexuality in a psychological or sociological sense, they could have some merit, but they should be presented with great caution and within certain boundaries.
In a civilized society, we should uphold good moral and ethical standards. These types of stories are not in line with the values that a healthy society tries to promote, such as respect, equality and propriety.
There are many other interesting and positive story genres like adventure stories or heart - warming friendship stories that are much more worthy of our attention.
No. Searching for such content is inappropriate and unethical as it involves vulgar and improper themes. We should focus on positive, healthy and respectful content in our information seeking.