Femdom features BDSM scenes in which the dominant partner is female. Tentacle erotica can be consensual, but frequently contains elements of non-consensual sex. Both sexes sometimes apply lubricating substances to intensify sensation. Pornography may be presented in a variety of media, including books, magazines, postcards, photographs, sculpture, drawing, painting, animation, sound recording, film, gay sex video video, and video games. There is, however, no hentai sex third party camera work involved. In some scenes or relationships it may be impossible for consent to be withdrawn in the middle of a scene, or the bottom may have the ability to revoke consent for a relationship as a whole, but not for a particular scene. The wife who enjoys cuckolding her husband is frequently called a hotwife, or a cuckoldress if the man is more submissive. The concept of lesbian, to differentiate women with a shared sexual orientation, is a 20th-century construct. Terminology for roles varies widely within the various BDSM subcultures. Women oriented pornography is sometimes referred to as sex positive pornography. Starting with erotic stories and woodblock prints from before the 20th century, Japanese pornography evolved into distinct subcategories with the momsex media that in addition of pornographic videos and magazines featuring live actors, there is exist categories of pornographic manga , pornographic computer games , and pornographic anime . BDSM communities generally welcome anyone with a non-normative streak who identifies with the community; this may include cross-dressers, extreme body mod enthusiasts, animal players, latex or rubber aficionados, and others. Films with risqué content commenced to be produced soon after the invention of the motion picture in the 1880s. Even though the performers who perform in these films typically appear on many reality websites within a short span of time, most of these websites claim that each of them is an amateur. In the fetish cuckolding subculture, it is most common for the female to take on the sexually dominant role and the male the submissive role, however, female subs, sometimes referred to as cuckqueans, also exist.