Pornography
There are different ideas about what is and what is not pornography. Diana Russell, a psychologist, says that there is a difference between pornography and erotica.  The word "erotica" is often used for pictures, movies or stories that focus on the beauty of sexuality.  There is not often a clear difference between "erotica" and "pornography." The dispute over what is or is not pornography can even go to the courts.