BDSM pornography depicts bondage and discipline, domination and submission, sadism and masochism. Bondage is usually, but not always, a sexual practice. It has been described as professionally made porn which seeks to emulate the style of amateur pornography. Solo pornography features performers masturbating. 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. It is also often mixed with other fetishes in practice, such as voyeurism, denial, etc. In general, softcore pornography is pornography that does not depict explicit sexual activity, sexual penetration or extreme fetishism. They are most often featured with male partners, but are also featured with other transsexuals or cissexual women. Partners can engage in penetrative gay sex video sex, known as full swap, or choose to soft swap in which they engage only in non-penetrative sex. Freud, however, considered such extensions of sexual interest to fall within the range of the normal, unless marked out by exclusivity . Gang bang pornography is a type of pornography that depicts an individual engaging in physical sexual activity with multiple partners sequentially or at once. It is common for this position to form part of BDSM, involving dominance and submission, though this need not be the case. Felching involves drinking recently ejaculated semen from the vagina or anus. It is practiced by people of all sexual lesbian hentai orientations, and can be part of a full repertoire of sexual activity. As observation is encouraged, voyeurism and exhibitionism are closely associated with dogging. The first film was released in 1980 starring Kay Parker. 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 milf fuck another 50 years. There are no particular or preferred elements within maiesiophilia that are common to all maiesiophiliacs. Discipline often incorporates sadomasochistic aspects, though some sadomasochists distance themselves from D/s practices such as punishment.