Men may also rub or massage the glans, the rim of the glans, and the frenular delta. Femdom features BDSM scenes in which the dominant partner is female. There are number of types of sex parties: Swinger party/gathering A swinger party or partner-swapping party is a gathering at which individuals or couples in a committed relationship can engage in sexual activities with others as a recreational or social activity. Jerk off instruction features milf fuck a performer encouraging or instructing the viewer to masturbate, often culminating in a countdown at the end of which the viewer is invited to induce gay hentai orgasm. Hamedori is a genre of Japanese pornography in which a male adult video actor or director serves as the camera operator. Stimulating the prostate from outside, via pressure on the perineum, can be pleasurable as well. Bondage pornography specializes in the depiction of sexual bondage or BDSM activities as photographs, stories, movies, or drawings. Normal quantities of ejaculate range from 1.5 to 5.0 milliliters . Group sex most commonly takes place in a private sex party or semi-public swinger gathering, but may also take place at massage parlors or brothels or, in some jurisdictions, at purpose-built locations such as sex clubs. Urolagnia is a form of salirophilia in which sexual excitement is associated with the sight or thought of urine or urination. Transgender pornography features performers who cross-dress for sexual gratification, either for themselves or for their partners. Solo pornography recognized with AVN Awards include the All Alone series and All Natural: Glamour Solos. Commenting on why there are not as many female macrophiles, psychologist Helen Friedman theorized that because women in most societies already view men as dominant and powerful, there no need for them to fantasize about it. Target audience are teenage / young adult women. 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 gay bear porn a wizard.