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.
My friend’s husband left her for his step sister. They (the husband and step sister) now live with their dad. The dad moved out of the master bedroom so they could sleep together during the two-year affair before they were exposed. They became step siblings as children - elementary/ middle school age. They did not grow up in the same house, but did spend weekends and school breaks together. The things that freak me out are – they will share the inheritance when the dad passes – if they break up (Is there a Hallmark card for breaking up with your sister?) who moves out? I realize this has nothing to do with porn. It just shows that some people are fucked up.
Ohhh. I forgot i had posted this before. You asked the same then and I don’t know what it means. Maybe that’s something from their childhood? Do you know them? Maybe sibling fuckers are more common than i realized.