I believe that fantasy incest is common in people’s minds when they masturbate or watch porn, but I notice that all of the seemingly incest themed porn makes clear that someone is a step-son, step-daughter, step-mom or step-dad. I’m assuming this is because, even if the porn video is a work of fiction, explicitly describing it as actual incest is illegal. Likewise, I wonder if people who write incest themed stories are equally reluctant to identify the other party in the story as an actual relative, because they fear getting in trouble, somehow? I’m just trying to figure out how common it is amongst humans to get turned on by incest fantasy, as opposed to the number of people who admit that they are. For me, by the way, none of my incest fantasies have ever involved my actual relatives, just the idea of it, i.e. like Kay Parker as Mom in the Taboo movies.
Source: reddit.com/r/eroticliterature/comments/rrxt5d/fantasy_fantasies_and_stories_about_incest