Many cultures describe pain as an aphrodisiac. Gay-for-pay describes male or female actors, pornographic stars, or sex workers who self-identify as heterosexual but who are paid to act or perform as homosexual professionally. In some scenes or relationships it may be impossible for consent to be withdrawn in the middle of a scene, or the bottom may have the ability to revoke consent for a relationship as a whole, but not for a particular scene. Sexual relations between women have been illustrated as well as narrated, but much of the written material from the early modern period has been destroyed. The gaysex other person may do the same during or after. Interactive pornography, available in CD-ROM and DVD format, allows the viewer to select the particular acts performed at any one time, sometimes with the camera providing a first person view. There are number of types of sex parties: Swinger party/gathering A swinger party or partner-swapping party is a gathering at which individuals or couples in a committed relationship can engage in sexual activities with others as a recreational or social activity. Commercialized pornography accounts for a nearly US0 billion worldwide industry for the production of various media and associated porn milf products and services. Sexual orientation Pornography features an increasing variety of combinations of actors by their sexual orientation such as lesbian, gay, bisexual, and transsexuals in addition to traditional heterosexual roles. Women who perform in lesbian pornography often do not consider themselves lesbian or bisexual. Threesome can also refer to a love triangle, a three-way romantic hentai videos relationship. This stop and go build-up, known as edging, can achieve even stronger orgasms. The wife who enjoys cuckolding her husband is frequently called a hotwife, or a cuckoldress if the man is more submissive. 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.