Pornographic films or sex films are films that depict sexual fantasies and seek to create in the viewer sexual arousal and erotic satisfaction. Such films usually include erotically stimulating material such as nudity and the explicit portrayal of sexual activity. The industry generally refers to such films as adult films, which generally fall into a number of sub-genres. Pornography is often referred to as "porn" and a pornographic work as a "porno". Older names for a pornographic movie include "adult film", "stag film", and "blue movie". In general, "softcore" refers to pornography that does not depict sexual penetration or "extreme fetish" acts, while "hardcore" refers to pornography that depicts penetration or extreme fetish acts, or both.
