This practice has a distinct effect of immobilization and pain. Arguably the most famous gay sex video example of the genre is the Taboo series. With second wave feminism and growth of scholarship in women history and sexuality in the 20th century, the definition of lesbian broadened, sparking a debate about sexual desire as the major component to define what a lesbian is. Cum-shot pornography features a collection of male ejaculation scenes. RACK may lesbian milfs be seen as focusing primarily upon awareness and informed consent, rather than accepted safe practices. Fisting, handballing, fist-fucking, brachiovaginal, or brachioproctic insertion is a sexual activity that involves inserting a hand into the vagina or rectum. This is also the case in many relationships not considering themselves as sadomasochistic; it is considered to be a part of BDSM if it is practiced purposefully. The films were financially successful, winning AVN Awards for the best selling pornographic films of their year; however the events were effectively un-officiated and the record breaking claims often misleading. Also see POV. Solo pornography features performers masturbating. Pornography can be classified according to the physical characteristics of the participants, fetish, sexual orientation, etc., as well as the types of sexual activity featured. The term bareback is used less frequently in the heterosexual community. Central to the typical MILF narrative is an age-play dynamic of older women and younger lovers. As of 2010, they were reported to live together as a monogamous couple outside of their porn careers and want to continue working together for another 50 years. Sexual scenarios may involve male domination, female submission, hentai sex exhibitionism and erotic entertainment. For their consent, they must have relevant information at hand and the necessary mental capacity to judge. However the genre remains a very small proportion of the pornographic DVD market; for example at porn retailer HotMovies. However, sex researchers and adolescent health care professionals have found no evidence for the existence of rainbow parties, and as such attribute the spread of the stories to a moral panic.