Well, it's mostly not ethical. Fiction is a form of art and communication, but forced torture stories cross a moral boundary. These types of stories can be used to shock and gain attention in a cheap way. They don't contribute to the overall well - being of the readers or society. Instead, they can create a sense of unease and promote a culture of violence, which is not what we should strive for in a civilized world.
This kind of content involves violence and abuse which violates basic human values. We should abide by ethical and moral norms and stay away from any form of promoting such negative content.
Most mainstream movies avoid such explicit and disturbing content. The movie industry generally adheres to certain moral and ethical standards, and such a plot would be considered inappropriate and offensive for a wide audience. However, in some very low - budget or underground movies that are not subject to the usual regulations, there might be some extremely rare and inappropriate depictions, but these are not the norm.
Such stories often involve very disturbing and unethical content. However, in a civilized and legal society, prisons are supposed to be places of rehabilitation and protection of rights. While there may be individual untrue rumors or fictional accounts, the vast majority of prisons have strict regulations to prevent any form of sexual abuse.
Torture stories involving cocks are often cruel and inhumane topics, and we should not promote or discuss such content. We should focus on positive, kind and legal topics.
Denial torture is a heinous practice that should never be associated with any sexual device, including a spiked cock ring. These are two very disturbing ideas that should be condemned. In a proper sexual relationship, there should be mutual respect, communication, and no form of abuse or torture.
There are very few such stories in mainstream literature as it involves inappropriate and disturbing content. However, in some edgy or underground fictional works, there might be themes of coercion and abuse that could be loosely related, but these are not common or widely promoted due to ethical and moral reasons.
There are also heartwarming stories about friendship and family. Stories that show how people support and love each other in difficult times can be very inspiring and a much better choice than any inappropriate content.