Although it is common to discuss films for which the actors had sex on set using terms such as "real sex" or "unsimulated sex", some film scholars prefer to speak of "visible sex", "explicit sex", or "hard-core sex". Linda Williams, for instance, proposes that "we eliminate the awkward term 'unsimulated sex' entirely". This is also because most film censors have predominantly focused on whether sex acts (penetration, fellatio, cunnilingus) or aroused genitals are visible when deciding whether a film should be classified as pornographic or be distributed on general release. For instance, it was not uncommon for two versions of pornographic films to be released: a hardcore version subject to restrictions, and a softcore version passed at "18" level. In both cases, the actors performed sex acts on set, but they were visible only in the hardcore version. Moreover, there has been a huge blurring of the distinctions between the use of prostheses (in
Trouble Every Day, Blue is the Warmest Colour, Battle in Heaven,
Holiday), actual genital contact between actors (
Intimacy, Baise-moi, The Brown Bunny, 9 Songs) and genitals added in post-production (
Irreversible). The visibility of penetration/fellatio/cunnilingus on the screen is more important to the experience of watching the film, and often to the concerns of censors and critics, than exactly what took place on set. The idea of simulation also relates to questions about acting, unnecessarily denigrating pornography, and is too vague about what is being simulated. For instance, while an actor's penis may enter an actress's vagina on a porn set, this does not mean that each of their actions, emotions, noises, and so on, are not performed quite differently than they would be in the privacy of their own home: "it is both real – something that actually happens between people – and a fake, staged for the camera and sound equipment. Neither the directors of pornography nor the directors of hard-core art, from Warhol forward, document 'real sex' in the sense of what people do alone, in private." ==Rationales==