Pornography is generally classified as either softcore or hardcore pornography. Now facial cumshots are regularly portrayed in pornographic films, videos, magazines and internet web sites. The principal characteristic of voyeurism is that the voyeur does not normally interact directly with the subject of his/her interest, who is often unaware of being observed. Mutual masturbation can be practiced by males or females in pairs or groups with or without actually touching another person as indicated by the following examples of contact versus non-contact scenarios: Non-contact mutual masturbation Two people masturbating in the presence of each other but not touching. Others may also use vibrators and other sexual devices more commonly associated with female masturbation. Mammary intercourse is said by Alex Comfort to produce mutual orgasm in women with sensitive breasts , and it was one of the nine substitute exercises for penetrative sexual activities, as detailed in the Paradis Charnels of 1903. Women porn is often produced by women and aimed specifically at the female market - rejecting the view that men videos porno gay are turned on by porn but Hardcore Porn women only by a box of chocolates. Squirt pornography involves women ejaculating. Saliva pornography involves salivation and saliva. The terms can be complimentary or pejorative. The term discipline describes psychological restraining, with the use of rules and punishment to control overt behavior. Within a BDSM or D/s context, facesitting can be an especially intense form of erotic humiliation. The speed of the hand motion will vary from person to person, although it is not uncommon for the speed to increase as ejaculation nears and for it to decrease during the ejaculation itself. These scenes may either have the cameraman directly engaging in sex or merely filming naked milf others having sex. Sometimes special furniture is used, hentai movies such as a queening stool or adult anime smotherbox. Another variant of reality pornography consists of normal couples that are filmed by professionals, in which case the only obvious distinction from amateur pornography is the higher quality of production, filming and editing.