Real jail or prison or police station shots or videos may violate laws in some countries. Women porn is often produced by women and aimed specifically at the female market - rejecting the view that men are turned on by porn but women only by a box of chocolates. This category also includes pornographic home movies. The stimulation may involve hands, fingers, everyday objects, sex toys or combinations of these. Incest pornography can feature actual relatives, but the main type of this pornography simply uses actors of similar looks to suggest family relationship. While bondage is a very popular variation within the larger field of BDSM, it is nevertheless sometimes differentiated from the rest of this field. The term discipline describes psychological restraining, with the use of rules and punishment to control overt behavior. Comic books often featured characters being tied up and tying others up, particularly in damsel in distress plots. There were also a very limited number of specialist fetish magazines which featured images of bondage, such as the famous Bizarre magazine published from 1946 to 1959 by the pioneering fetish photographer John Willie, and ENEG Exotique magazine, published 1956-1959. Other possibilities are possible, such as a man having sex with two women who are having sex with each other. Crying hentai sex pornography that features participating actors crying. Ethnic pornography is a genre of pornography that features performers of specific ethnic porn milf groups, or depictions of interracial sexual activity. Performers are usually gay movies clean-shaven, thinner and more effeminate than ones in mainstream gay pornography. Shibari is a Japanese word that literally means to tie or to bind. Arousal may be triggered by seeing the body movements or facial expressions of that 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. The person sat upon may be in bondage, sexually submissive, or simply held down by the body-weight of the other person.