Buck Angel is the best-known actor in this genre. Along with the penis, the scrotum is sensitive and considered to be an erogenous zone. They are most often featured with male partners, but are also featured with other transsexuals or cissexual women. Various groups within society have considered depictions of a sexual nature immoral, labeling them pornographic, and attempting to have them suppressed under obscenity and other laws, with varying degrees of success. The terms can be complimentary or pejorative. Erotic spanking is the act of spanking another person for the sexual arousal or gratification of either or both parties. Pegging is a recently invented word which features a woman penetrating a man with a strap-on dildo. Technically this is a form of exhibitionism rather than group sex per se. The stimulation may involve hands, fingers, everyday 3d hentai objects, sex toys or combinations of these. Making a pearl necklace is one of the activities that sex workers use as safe sex alternatives for people who refuse to wear condoms. They are often porn milf made out of precious woods, with leather used for the seat. Some productions are noted for sophisticated and/or experimental storytelling and animation techniques. In the United States, creating, distributing, or possessing crush videos has been illegal gay sex video since 1999, and many other countries also have banned them. In the attempts of circumvent this type of censoring , actors and producers have featured subject matter unseen or rarely depicted in western pornography. Practitioners have described going to public places such as a mall or a park. Interracial pornography typically employs ethnic and racial stereotypes in its depiction of performers and many of interracial pornographic films still include racial stereotypes, although the segregation of actors by race has diminished considerably. Challenged on two fronts – by anti-pornography feminists and by the traditional male double-standard – sex-positive feminists would sometimes seek for tactical reasons to distinguish erotica from porn - with the latter conventionally seen as both boring and disturbing.