Some productions are noted for sophisticated and/or experimental storytelling and animation techniques. Some techniques which may work for one individual can be difficult or uncomfortable for another. Reality Reality pornography refers to real or faked amateur encounters. The anus has a relatively high concentration of nerve endings and can be an erogenous zone, and the receiver may receive pleasure from external anal stimulation. Lucky Pierre is slang for a person performing both receptive and insertive anal and/or vaginal sex simultaneously during a threesome, being positioned between the two partners. Japanese rope bondage is distinguished by its use of specific katas and aesthetic rules. Sadomasochism does not imply enjoyment through causing or receiving pain in other situations . Anal sex or anal intercourse is generally the insertion and thrusting of the erect penis into a person anus, or anus and rectum, for sexual pleasure. It is mutual consent that makes a clear legal and ethical distinction between BDSM and such porn milf crimes as sexual assault or domestic violence. See Gay-for-pay. Can also include auto-fellatio, or performing oral sex on oneself. Group hentai videos sex is sexual behavior involving more than gay boy porn two participants. In some societies, the terms fox, plum, chick, or chicken are preferred. Mutual masturbation can be practiced by males or females in pairs or groups with or without actually touching another person as indicated by the following examples of contact versus non-contact scenarios: Non-contact mutual masturbation Two people masturbating in the presence of each other but not touching. It like associating every Christian with the zealots who cause religious wars. Pornographic films present sexual fantasies and usually include erotically stimulating material such as nudity. Heterosexual bareback sex, as opposed to sex with condoms, not only poses an increased risk of STIs, but for pregnancy as well. Especially popular in post-World War 2 Japanese culture. As of 2013, little analysis of this paraphilia has been reported in medical literature.