Often a dominant woman, she may be called a Dom, Domme /ˈdɒm/, Femdomme, Domina, or Dominatrix, depending on context or personal preference. The 1979 U. Caro rejected that as being a necessary conclusion, stating that female fatty deposits on the hips improve individual fitness of the female, regardless of sexual selection. BDSM has become an umbrella term for certain kinds of erotic behavior between consenting adults. Partners can engage in penetrative sex, known as full swap, or choose to soft swap in which they engage only in non-penetrative sex. Squirt pornography involves women ejaculating. A sub-set of gaping is the “‘tunnel cumshot”, wherein the male ejaculates directly into the gaping anus. Teacher and Student or Boss and Secretary pornography involves sexualized situations which take place between an authority figure, videos gays such as a teacher or boss, and an underling, such as a student or secretary, often fake. In places where non-monogamous sex is taboo or illegal, group sex may take place in private or clandestine locations including homes, hotel rooms, or private clubs. Also see porn milf POV. 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. However the genre remains a very small proportion of the pornographic DVD market; for example at porn retailer HotMovies. Though the term anal sex most commonly means penile-anal penetration, sources sometimes use the term anal intercourse to refer exclusively to penile-anal penetration, and anal sex to refer to any form of anal sexual activity, especially between pairings as opposed to anal masturbation. Contact mutual masturbation One person touching another person to masturbate. Erotic literature and pornographic films have been hentai porn devoted to the sexual uses of glory holes. Practitioners have described going to public places such as a mall or a park.