Masturbation is the self-sexual stimulation of the genitals for sexual arousal or other sexual pleasure, usually to the point of orgasm. Female dominance refers to milf xxx BDSM relationships and BDSM scenes in which the dominant partner is female. Specific sex acts Anal Anal pornography features anal penetration with a penis, dildo, other objects, or some combination of them. The term applies to the depiction of the act rather than the act itself, and so does not include live exhibitions like sex shows and striptease. The reverse of this, in which nude women interact with clothed men, is called Clothed male, naked female . John Stagliano is considered to have started the gonzo pornography genre with his Buttman series of films. Mammary intercourse is known as titty-fucking, titfuck, or a titjob in the United States, as well as tit wank or French fuck in the United Kingdom - the latter term dating back to the 1930s; while a more jocular equivalent is a trip down mammary lane. Other objects such as ball point pens and thermometers are sometimes used, although this practice can lead to injury and/or infection. This type gay cock of pornography is almost exclusively hentai, as true hermaphroditic humans are not fertile and are not usually found gay hentai in nature. Arcane or occult pornography involves sexualized situations with an occult or magical tone or performers who costume themselves in keeping with the theme, for example, a male performer dressed as a wizard. In the fetish cuckolding subculture, it is most common for the female to take on the sexually dominant role and the male the submissive role, however, female subs, sometimes referred to as cuckqueans, also exist. Cuckold fetish pornography that involves a cuckolded husband. 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. Sexual orientation Pornography features an increasing variety of combinations of actors by their sexual orientation such as lesbian, gay, bisexual, and transsexuals in addition to traditional heterosexual roles.