Well, these are considered inappropriate mainly due to the fact that they deal with sexual themes in a way that is not suitable for public consumption or general discussion. Society has certain standards regarding what is acceptable in terms of sexual content, and these stories violate those standards. They can also objectify people and promote an unhealthy view of relationships and sexuality.
Forbidden erotic stories are considered inappropriate because they often contain sexual content that goes against moral and ethical norms. Such content can be offensive and disrespectful to others, and may also have a negative impact on the psychological and social development of individuals.
Forbidden erotic stories are inappropriate because they cross the boundaries of decency. In a civilized society, we uphold values that promote respect, equality, and positive social interactions. Erotic content in these stories can be a form of exploitation, whether it's of the characters in the story or the readers/viewers who may be exposed to it. It can also create a hostile environment for those who do not wish to engage with such content, and it generally does not contribute to the betterment of the community or the individual's well - being.