Columbia subject headings:
Erotica.
Obscenity (Law)--United States.
Pornography--Social aspects--United States.
Social norms.
Harvard subject headings:
Erotica.
Obscenity (Law)--United States.
Pornography--Social aspects--United States
Social norms.
Princeton subject headings:
Erotica.
Obscenity (Law)--United States.
Pornography--Social aspects--United States.
Social norms.