Well, in the realm of mainstream literature, these are not acceptable. However, in some underground or unregulated forms of writing, they might exist, but that doesn't make them right. We should promote literature that is inclusive of all ages and respects different values, and these stories clearly don't meet those criteria.
No. These kinds of stories are inappropriate in a general public context. We should focus on topics that are ethical, positive and can be shared among all kinds of people without causing discomfort or violating social norms.
Sharing such explicit sex stories is inappropriate and not suitable for public discussion. We should focus on positive, healthy and respectful topics like relationship building and communication in a romantic context.
These stories can have a negative impact on society. They promote vulgarity and improper values. Young people exposed to such content may develop distorted views on relationships and sexuality.
No, it is extremely uncommon and highly abnormal behavior. Such a situation goes against all norms of healthy family relationships and basic moral and ethical values.
No. It is completely inappropriate for a mother to teach her son sex stories. This goes against normal family ethics and boundaries. Such topics are better left to appropriate educational resources like sex education classes in schools which are designed to handle these sensitive matters in an appropriate and age - appropriate manner.
There are many great adventure stories. For example, 'The Hobbit' by J.R.R. Tolkien. It tells the story of Bilbo Baggins who embarks on an unexpected journey with a group of dwarves to reclaim their homeland from a dragon. It's full of exciting encounters with various creatures like trolls and goblins.