I have a pet hypothesis that, on average, those into step porn are more likely not have grown up with a sibling of the gender they fancy. I reckon those of us who did are more likely to repelled by anything alluding to incest.
People who grew up with ACTUAL hot step siblings notwithstanding.
We’ll see if this is going to be controversial or not but isn’t the entire “step” -part of it there only to give people plausible deniability about incest accusations? It’s incest these people are turned on by. To my knowledge having sex with your step-anything isn’t incest because you two aren’t related.
Either way, I think that most people who like watching mom-son, brother-sister, dad-daughter etc. porn usually aren’t sexually drawn towards their own family. They just like the idea of sex between family members in general but not their own.
It’s not REALLY incest that turns them on usually. It’s the deep taboo of the potential act itself. Thus plenty of people are turned on by the thought when it involves others, and plenty more are turned off when it comes to their own family. Similar can be said for a lot of sexually charged taboo subjects.
But isn’t their fake incest porn anyway? I know it at least used to exist, so I don’t think it’s illegal to make that, so clearly that means that there isn’t a big market for it.
My theory has always been that it’s a way to trick peoples minds that the actors are younger, because that very much is a thing.
I don’t know anyone who is attracted to their siblings, even if they are conventionally very attractive.
If my memory serves, in the early days of free online porn the step-prefix wasn’t generally used. I can dimly remember the time it started appearing all over and I always suspected it was because implying it was actual incest was a bit too taboo so they modified the titles into step-porn so that it’s not as provocative. Maybe advertisers had something to do with it, who knows. Or maybe it’s because they realized that people find it easier to fantasize about step-siblings rather than biological ones.
You make some good points, there could be a lot of factors… hell it could be that it took a while for the divorce and remarry rate to kick up and before that step siblings simply weren’t as common. There should probably be a good lag too between those numbers and when it started to become a cultural thing.
I would be interested in some deep research at this point.