Go watch some porn in public.
As for the concept of porn itself, it's relegated to other bedroom topics and just doesn't come up in "polite" conversation.
I haven't personally observed this, but our society certainly shames the women who perform in pornography.
Only in liberal, upper middle class, circles. Which of course includes most of the wannabe upper-middle-class talking heads and journalists.
Middle class society don't share the "empowered, sexy" view for porn on women at all.
It's a society of hypocrites and puritans.