No. Writing or promoting erotic stories, especially those involving specific and potentially inappropriate sexual content, is not acceptable in a general and ethical context. It violates moral and often social norms.
It's not appropriate at all. Such stories are not suitable for public discussion or sharing. They can make others uncomfortable and are not in line with good taste and ethical standards. We should focus on positive, healthy and respectful topics.
Definitely not. Such a topic is vulgar and goes against basic moral and ethical standards. We should focus on positive, respectful and appropriate topics in communication.
Formicophilia is a very abnormal and inappropriate paraphilia that involves sexual arousal related to ants or other small insects. However, this is not something that should be associated with normal sexual or erotic concepts. Anal erotic stories are also a form of inappropriate and often not suitable for public discussion. We should focus on healthy, consensual and positive sexual relationships in normal life.
One ethical concern is that it promotes vulgarity. These types of stories are not in line with the values of a respectful and proper society. Also, it can be a form of objectifying individuals which is unethical.