The porn industry and viewing public were shocked by the then-taboo spectacle of a white woman having sex with a black man. This may relate to fetishes such as voyeurism or cuckolding. A pearl necklace is a slang term referring to a sexual act in which a man ejaculates semen on or near the neck, chest, or breast of another person. Ass to mouth pornography shows the transfer of a performer penis from a second performer anus to that same second performer mouth in a single shot. Bisexual momsex DVDs sell much better online than in adult video stores, possibly due to customers in stores feeling embarrassed to buy them. Transsexual pornography is a genre gay sex video of pornography. It is commonly depicted in pornography, but very rarely in mainstream cinema. Examples of heterosexual pornographic film series featuring creampies include Cream Filled Teens and Internal Cumbustion. Generally, interest differs between people, and gender depends on sexual orientation. The genres of pornography are based on the type of activity featured and the category of participants, for example mateur pornography is a category of pornography that features models, actors or non-professionals performing without pay, or actors for whom this material is their only paid modeling work. These scenes may involve the female actor calling for the shot to be directed at some specific part of her body. A somewhat controversial ejaculation control technique is to put pressure on the perineum, about halfway between the scrotum and the anus, just before ejaculating. A few extremely flexible males can reach and stimulate their penis with their tongue or lips, and so perform autofellatio. Pornography is often referred to as porn and a pornographic work as a porno. Watersports pornography features sexual activities involving urine, such as golden showers. Examples hentai porn include the Girls Gone Wild and Girls Who Like Girls Series. Cuckold fetish pornography that involves a cuckolded husband. It is sometimes combined with BDSM features.