Obscenity is the judicially recognized exception to the first amendment.
The Greek male ideal had a small penis, an aesthetic the Romans later adopted.
There are numerous sexually explicit paintings and sculptures from the ruined Roman buildings in Pompeii and Herculaneum but the original purposes of the depictions can vary.
In Pompeii, phalli and testicles engraved in the sidewalks were created to aid visitors in finding their way by pointing to the prostitution and entertainment district as well as general decoration.
The Romans considered depictions of sex to be decoration in good taste, and indeed the pictures reflect the sexual mores and practices of their culture, as on the Warren Cup.
The history of erotic depictions includes paintings, sculpture, photographs, dramatic arts, music and writings that show scenes of a sexual nature throughout time.
They have been created by nearly every civilization, ancient and modern.
The Greeks and Romans produced much art and decoration of an erotic nature, much of it integrated with their religious beliefs and cultural practices.
In more recent times, as communication technologies evolved, each new technique, such as printing, photography, motion pictures and computers, has been adapted to display and disseminate these depictions.
In early times, erotic depictions were often a subset of the indigenous or religious art of cultures and as such were not set aside or treated differently than any other type.
The modern concept of pornography did not exist until the Victorian era.
Pornography has existed throughout recorded history and has adapted to each new medium, including photography, cinema, video, and computers and the internet. government from restricting speech based on its content.