A woman can use a secondary vibrator, between the dildo and her genitals, to get pleasure from pegging. Positions can also be chosen specifically for added effects such as increased humiliation, elevation and suspension. The term BDSM dates back to 1969; however, the origin of the term BDSM is unclear and is believed to have been formed either from joining the term B&D with S&M , or as a compound initialism from B&D, D&S , and S&M. Pegging films include Strap It On , Babes Balling Boys , Strap Attack, Strap-on Sirenz, Strap-on Chicks, Boss Bitches , various movies produced by LEDA Studios, and San Francisco-based Men In Pain. A scene where many women have sex with one man is referred to as a reverse gang-bang. Mammary intercourse is known as titty-fucking, titfuck, or a titjob in the United States, as well as tit wank or French fuck in the United Kingdom - the latter term dating back to the 1930s; while a more jocular equivalent is a trip down mammary lane. However, various groups within society considered such depictions immoral, labelling them pornographic, and attempting to have them suppressed under obscenity laws, with varying degrees of success. In the gay pornography industry, which uses amateurs as well as professional actors, the term gay-for-pay refers to actors labeled or believed to be straight but who engage in same-sex sexual activities for money. While some fantasize about a giantess gay cock who is slightly taller than himself, others are interested in giantesses that are hundreds or even thousands of feet tall. Point of view pornography is adult entertainment filmed to look as if the watcher were experiencing the sex act themselves. As women, they face concerns separate from men. Works in this genre may explore philosophical, political or social milf xxx issues. Some masturbate only using pressure applied to the clitoris without direct contact, for example by pressing the palm or ball of the hand against underwear or other clothing. The name was coined from the title of the controversial hentai videos book.