I tend to agree with the perspective that this is a display of a desire to “reenact” and process personal and collective/intergenerational traumatic experiences (similar to violence in movies) on the one end, and the desire to repress and deny them on the other hand (position to ban; protection of perpetrator by silencing the victim). It reminds me of a psychology paper about whether BDSM practices are useful to process traumatic experiences or if the downsides prevail.

https://www.tandfonline.com/doi/full/10.1080/0092623X.2024.2...

The question is, if we ban such “phantasies”, are we not merely strengthening repression and silencing of trauma, and by that perpetuating it. Or how do we go about sprinkling in a conscious awareness of why the urges exist to go deeper with them without the shame/blame to protect the original pain and misdeeds, rather than just continually repeating them, both as fantasy/role play and in real abuse.

I want to additionally mention but not link to the subreddits full of incest fantasy stories (or are they), and a reminder that abuse leads to abuse fantasies in the victim until it is properly processed and integrated. As long as we shame victims additionally for this healthy mechanism of the psyche we will be doomed to repeat it.