Yes, in a way they can be considered a form of literature. Just like other forms of fictional or semi - fictional writing, they tell a story, often with characters, settings, and a plot. They may not be part of the mainstream literary canon, but they do fall under the umbrella of written works that explore human relationships and sexuality.
However, they are a very niche form of literature. They are mainly targeted at a specific audience interested in the swinging lifestyle or those with an open - minded approach to sexual exploration in literature. Unlike traditional literature that is more widely accessible and may have broader themes like love, war, or society at large, erotic swingers stories are more focused on the particular experiences within the swinging community.
Moreover, their status as 'literature' can be debated. Some may argue that due to their explicit sexual content, they are more of a form of adult entertainment writing rather than high - brow literature. But if we consider literature as any written work that can convey ideas, emotions, and experiences, then erotic swingers stories can be seen as a type of literature, albeit a controversial and specialized one.