>>2484893>>2484911>>2485011>>2485154It's like the fictional version of the daddy/son or daddy/little girl kink stuff that's everywhere irl, most people into it get anti-boners like anyone else thinking of their real family.
It's the fantasy dynamic that's more attractive than any standalone person by themselves, and since said most people aren't attracted to their real family compartmentalizing and distinguishing it from real life incest and it's effects is easier.