The dictionary seems to disagree.
Definitions of pornography (n):
por·nog·ra·phy [ pawr nóggrəfee ]
sexually explicit material: films, magazines, writings, photographs, or other materials that are sexually explicit and intended to cause sexual arousal
sexual images industry: the production or sale of sexually explicit films, magazines, or other materials
Definitions of erotica (n)
e·rot·i·ca [ i róttikə ]
sexually explicit material: art or literature intended to arouse sexual desire by portraying sex in an explicit way.