Boots are seen as the perhaps most fetishistic of all footwear and boots may be the most popular fetish clothing attire. Most bisexual porn is made by small production companies rather than momporn the major studios. Men may also rub or massage the glans, the rim of the glans, and the frenular delta. A pornographic work is characterized as hardcore if it has any hardcore content, no matter how small. Pussing: British expression for an activity involving a consenting couple where the male partner watches the woman urinate otherwise undetected in a semi-public place, usually a toilet cubicle at a pub, hotel, restaurant, theatre/cinema, office, club etc. In POV porn, the shooting style is generally similar to gonzo pornography, with the person receiving sexual gratification holding the camera him or herself—aiming it down at the actress or actor who is performing the sex act. A sex party is a gathering at which sexual activity takes place. Sigmund Freud considered foot binding as a form of fetishism. The term pearl necklace is used by some because the drops of semen deposited by the man resemble a necklace of translucent white pearls. In S/M, the Sadist is usually the Top and the Masochist the Bottom, but these roles are frequently more complicated or jumbled . Use of the agreed safeword hot gay sex is seen by some as an explicit withdrawal of consent. Femdom features BDSM hentai porn scenes in which the dominant partner is female. Yuri : Featuring two grown adult women in a homosexual/lesbian relationship. The volume of semen that is ejaculated depends on several factors, including the male health, age, degree of sexual excitement, and the time since his last ejaculation. Shotacon : Similar to Lolicon, this genre involves prepubescent or under-aged boys between the ages 6–12. Interactive pornography, available in CD-ROM and DVD format, allows the viewer to select the particular acts performed at any one time, sometimes with the camera providing a first person view. Clothed female, naked male pornography features naked men and clothed women; typically, the women humiliate and abuse the men or perform fellatio and/or handjobs on the men.