Pornography
Pornography is writing, graphics, or imagery depicting sexuality.
The word comes from the Greek, meaning "writing about prostitutes". There is a lot of debate over the difference between pornography and erotica.
In the real world, the pornography industry keeps close ties to prostitution, inasmuch as it is largely comprised of videos and images of actual people being paid to have sex, and both industries thrive on the exploitation of women as sexual objects for men's consumption.
There are some attempts at creating less exploitative pornography, or making pornography designed to appeal to women consumers (and there is a large amount of pornography sold to gay men), but this does not cancel out the overwhelming oppression of women within the industry, and cannot revolutionise the industry in its wider context as an expression of patriarchy.