Other popular implements are canes, riding crops, whips, switches, big tit milf birches, sneakers, rolled-up newspapers, rulers or martinet. The essence of voyeurism is the observing but may also involve the making of a secret photograph or video of the subject during an intimate activity. BDSM has become an umbrella term for certain kinds of hentai porn erotic behavior between consenting adults. In a bath or shower a female may direct tap water at her clitoris and vulva. Explicit sexual activity, such as sexual penetration, may occur within a session, but is not essential. Ethnic pornography is a genre of pornography that features performers of specific ethnic groups, or depictions of interracial sexual activity. 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. Fisting may be performed with or without a partner. Strappado with rope and a spreader bar. Solo pornography features performers masturbating. Pornographic films or sex films are films that present sexually explicit subject matter for the purpose of sexual arousal and erotic satisfaction of the viewer. Hidden Camera pornography involves shots that appear to spy or peep on a woman who is unaware she is being viewed or filmed while dressing, going to the bathroom, or showering; either at home or in a commercial place, such as a locker room, public restroom, spa , or dressing room. Yiff or Yiffy pornography features Furry or anthropomorphic animals in an erotic or sexual context. In recent years, Japanese films of this genre have become more common in the USA and Europe although it still remains a small, fetish-oriented videos porno gay part of the adult film industry. Accepting that Eros is not always pretty, and may involve the forbidden or taboo - as with women pornography – forms part of the struggle with the good girl/bad girl or virgin-whore split in postmodern femininity.