Wirtualna wycieczka po In recent years, Japanese films of this genre have become more common in the USA and Europe although it still remains a small, fetish-oriented part of the adult film industry. Mammary intercourse is said by Alex Comfort to produce mutual orgasm in women with sensitive breasts , and it was one of the nine substitute exercises for penetrative sexual hot milf porn activities, as detailed in the Paradis Charnels of 1903. In the 1970s, the hardcore pornography genre introduced the stereotypical cumshot scene as a central element of the hardcore film, in which the male actor ejaculates in a way ensuring maximum visibility of the act itself. It may involve sexual attraction to women who are pregnant or appear pregnant, attraction to lactation, or attraction to particular stages of pregnancy such as impregnation or childbirth. Given the wide range of practices, some of which may be engaged in by people who do not consider themselves as practicing BDSM, inclusion in the BDSM community or subculture is usually dependent on self-identification and shared experience. Can also include auto-fellatio, or performing oral sex on oneself. They cited the Internet and text messaging as common ways of organising meetings. Sex experts have praised various techniques that the performer can use during fellatio to increase their partner pleasure. Fantasies of group sex are extremely common among both men and women, and group sex is a subgenre in pornographic films. The stimulation may involve hands, fingers, everyday objects, sex toys or combinations of these. Others may also use vibrators and other sexual devices more commonly associated with female masturbation. The term lesbian is also used with regard to sexual identity or sexual behavior, regardless of sexual orientation, or as an adjective to characterize or associate nouns with female homosexuality or same-sex attraction. While bondage is a very popular variation within the larger field of BDSM, it is nevertheless sometimes differentiated from the rest of this field.