Especially popular in post-World War 2 Japanese hentai videos culture. It is sometimes combined with BDSM features. This may relate to fetishes such as voyeurism or cuckolding. This stop and go build-up, known as edging, can achieve even stronger orgasms. Individuals are also sometimes abbreviated when referred to in writing, so a dominant person may be referred mature milfs to as a Dom for a man, and a Domme for a woman. A common way that these are depicted in a single scene is with one woman and two men performing together. Dwarfs or midget pornography features performers who are dwarfs/midgets. For legal reasons, the vast majority of so-called reality porn involves professional actors and actresses posing as so-called amateurs. Creampie scenes depart from heterosexual pornographic convention in favor of a depiction that more closely mimics sexual intercourse as performed in ordinary life; they have been called the counterimage of facials. Reality pornography is professionally made porn which seeks to emulate the style of amateur pornography. Actual upskirt or downblouse shots may violate privacy laws in some countries. Transsexual porn star Wendy Williams has stated that transsexual porn is classified as Straight Specialty. A few extremely flexible males can reach and stimulate their penis with their tongue or lips, and so perform autofellatio. Related genres include: Amateur pornography originally referred only to pornography produced by amateurs but now also includes professionally made pornography designed to appear as if it were amateur. BDSM actions gaysex can often take place during a specific period of time agreed to by both parties, referred to as play, a scene or a session. 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. While bondage is a very popular variation within the larger field of BDSM, it is nevertheless sometimes differentiated from the rest of this field. Some women who engage in same-sex sexual activity may reject not only identifying as lesbians but as bisexual as well, while other women self-identification as lesbian may not align with their sexual orientation or sexual behavior; sexual identity is not necessarily the same as one sexual orientation or sexual behavior, due to various reasons, such as the fear of identifying their sexual orientation in a homophobic setting.