Since at least 3d hentai 1973, it has also been used to refer to a sexually attractive young woman. Foot fetishism, foot partialism, foot worship, or podophilia is a pronounced sexual interest in feet. Saliva pornography involves salivation and saliva. The related term twinkle-toes, which implies that a man is effeminate, tends to be used in a derogatory manner. Guro or Gore is a genre of Japanese pornography involving blood, gore, disfiguration, violence, mutilation, urine, enemas, or feces. Although pornography has usually focused on heterosexuality, due to the prevalence of the heterosexual orientation, explicit gay material has a long history as well, which reaches back to Greek antiquity, if not to prehistory. Fisting involves the insertion of one partner entire hand into a vagina or the anal cavity. The person sat upon may be in bondage, sexually submissive, or simply held down by the body-weight of the other person. In the context of consensual erotic activities, sadism and masochism are not strictly accurate terms; there is a significant difference from the medical or psychological usage of both terms. Reality Reality pornography refers to real or faked amateur encounters. Pornographic films present sexual fantasies and usually include erotically stimulating material such as nudity. By Japanese law, the genitals of actors and actresses must be censored and up the mid-1990 so was the depiction of pubic hair. Shemale is a term primarily used in sex work to describe a trans woman with male genitalia combined with female secondary sex characteristics, usually including augmented female breasts, from breast augmentation and/or use of hormones. It is mutual consent that makes a clear legal and ethical distinction between BDSM and such crimes as sexual assault or domestic violence. Common phrases used to refer to these individuals are chicks with dicks, trannies, or shemales, although these are generally considered pejorative slurs among transwomen. Gonzo porn is influenced by amateur videos gays pornography, and it tends to use far fewer full-body/wide shots in big tit milf favor of more close-ups .