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. Cuckold fetish pornography that involves a cuckolded husband. Women oriented pornography is sometimes referred to as sex positive pornography. Pornography in Japan is large and intertwined business of adult entertainment with unique characteristics that readily distinguish it from western pornography. Though there have been numerous gang bang pornographic films since the 1980s, they usually involved no more than half a dozen to a dozen men. If this is done using penises and/or strap-on dildos, this is sometimes called the sandwich or BigMac. There has been an increase in discussion and portrayal of masturbation in art, popular milf fuck music, television, films, and literature. Spanking can be administered in a number of spanking positions. Stimulating the prostate from outside, via pressure on the perineum, can be pleasurable as well. Sigmund Freud considered foot binding as a form of fetishism. Several hundred exclusively pegging films were produced, as well as twice as many bisexual and straight films with strap-on scenes. Mammary intercourse is a sex act, performed as foreplay or as non-penetrative sex, that involves the stimulation of the male penis by the female breasts and vice versa. 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. Hardcore pornography is pornography that depicts penetration or extreme fetish acts, or both. A few extremely flexible males can reach and stimulate their penis hentai videos with their tongue or lips, and so perform autofellatio. Double Stuffed , Double Vaginal gay sex video , or Double Anal pornography involves the penetration of one orifice by two penises or other objects. Sub-genres can also be classified into the characteristics of the performers or the type of sexual activity on which it concentrates, and not necessarily on the market to which each sub-genre appeals.