I think it's because porn doesn't have so much of a social aspect as movies or music do. So tastes are less regulated by normalization through discussion, whic

I think it's because porn doesn't have so much of a social aspect as movies or music do. So tastes are less regulated by normalization through discussion, which means "movies I can talk about with friends" is an important factor in that industry. Porn is much more about revealed preferences in isolation.