Japanese rope bondage is distinguished by its use of specific katas and aesthetic rules. Clothed female, naked male is a genre of erotica featuring one or more nude men and one or more clothed women. It has been described as professionally made porn which seeks to emulate the style of amateur pornography. See Gay-for-pay. Individuals who can change between top/dominant and bottom/submissive roles—whether from relationship to relationship or within a given relationship—are known as switches, though the term switch in this context is occasionally seen as derogatory and is rejected by many who might simplistically fit the definition. The person sat upon may be in bondage, sexually submissive, or simply held down by the body-weight of the other person. Kinbaku is a Japanese style of bondage or BDSM which involves tying up the bottom using simple yet visually intricate patterns, usually with several pieces of thin rope . It is also often mixed with other fetishes in practice, such as voyeurism, denial, etc. It may be regarded as taboo or unnatural, and is a criminal offense in some countries, punishable by corporal or capital punishment; by contrast, people also regard anal sex as a natural and valid form of sexual activity that may be as equally fulfilling as any other desired sexual expression. The stimulation may involve hands, fingers, everyday objects, sex toys or combinations of these. Sexual scenarios may involve male domination, female submission, exhibitionism and erotic entertainment. Can also include auto-fellatio, or performing oral sex on oneself. A smotherbox has two openings. These typically are leaked to the public via the Internet, with or without the celebrity consent. Boot fetishism is a sexual gay video fetish dedicated to boots. In some areas, there are laws stating it is not legally possible to consent to be killed, and elsewhere it may still be legally dubious . Erotic spanking is the act of spanking another person for the sexual arousal or gratification of either or both parties.