Anal sex is considered a high-risk sexual practice because of the vulnerability of the anus and rectum. Social attitudes towards the discussion and presentation of sexuality has become more tolerant and legal definitions of obscenity have become more limited, leading to an industry for the production and consumption of pornography in the latter half of the 20th century. Most consumers of bisexual pornography do not identify as gay. In the attempts of circumvent this type of censoring , actors and producers have featured subject matter unseen or rarely depicted in western pornography. Fisting, handballing, fist-fucking, brachiovaginal, or brachioproctic insertion is a sexual activity that involves inserting a hand into the vagina or rectum. One is in a vertical side of the box for the neck of the person who has their head inside the smotherbox. Masturbation involves touching, pressing, rubbing or massaging a person genital area, either with the fingers or against an object such as a pillow; inserting fingers or an object into the anus ; and stimulating the penis or vulva with an electric vibrator, celeb sex video which may also be inserted into the vagina or anus. Erotic spanking is the act of spanking another person for the sexual arousal or gratification of either or both parties. Ethnic pornography is a genre of pornography that features performers of specific ethnic groups, or depictions of interracial sexual activity. It explores the more mental aspect of BDSM. Bodily functions Menstrual or red rhapsody pornography features sexual activities involving women who are menstruating, with a focus on the menstrual blood. Wetlook pornography involves clothed wet persons. Given the wide range of practices, some of which may be engaged in by people who do not consider themselves as practicing BDSM, inclusion in the BDSM community or subculture is usually dependent on self-identification and shared experience. Often, slave contracts are set out in writing to record the formal consent of the parties to the power exchange, stating their common vision of the relationship dynamic.