One interesting animated animal story is 'The Lion King'. It tells the story of Simba, a young lion who must overcome his uncle Scar to reclaim his rightful place as king. The characters are all animals, and it's full of great music and beautiful animation.
In many stories like 'Charlotte's Web', the friendship between Wilbur the pig and Charlotte the spider shows the importance of loyalty and selflessness. Charlotte uses her web - spinning skills to save Wilbur from being slaughtered, which is a great example of sacrifice for a friend. Animated animal stories use these simple yet powerful relationships to convey important values to the viewers.
The main distinction of porn with a story genre from regular porn is the presence of a coherent narrative. Regular porn often jumps straight to the sexual action, while the story genre tries to add some kind of story framework around it. But in the end, both are adult-oriented and feature explicit sexual content.
Well, it's hard to say for sure. The concept of 'porn-like' is quite subjective. Some might consider certain novels with excessive sexual descriptions as such, but it depends on individual perspectives and cultural standards.
In many places, 18+ porn comics are considered illegal. This is because they can have a negative impact on society and violate moral and legal standards.