Fisting pornography features the insertion of an entire hand into a performer vagina or anus. 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. Technically this is a form of exhibitionism rather than group sex per se. Reality Reality pornography refers to real or faked amateur encounters. For example, the Kama Sutra, in particular, goes into specific detail on how to properly gay twinks strike a partner during momsex sex. With second wave feminism and growth of scholarship in women history and sexuality in the 20th century, the definition of lesbian broadened, sparking a debate about sexual desire as the major component to define what a lesbian is. Weather Report Girl is considered yuri hentai in English hentai videos usage for its depiction of lesbian sex, but in Japan it is just yuri. BDSM pornography depicts bondage and discipline, domination and submission, sadism and masochism. Ethnic pornography is a genre of pornography that features performers of specific ethnic groups, or depictions of interracial sexual activity. A sexual fetish may be regarded as an enhancing element to a romantic/sexual relationship achieved in ordinary ways or as a mental disorder/disorder of sexual preference if it causes significant psychosocial distress for the person or has detrimental effects on important areas of their life. Bukkake, Gokkun, Omorashi, and tentacle erotica are few uniquely Japanese genres known to western viewers. Typically features a feminine Uke, or submissive, and a masculine Seme, or dominative. Can also include auto-fellatio, or performing oral sex on oneself. Within a BDSM or D/s context, facesitting can be an especially intense form of erotic humiliation. Fat fetishism also incorporates stuffing and padding, whereas the focus of arousal is on the sensations and properties of a real or simulated gain. It explores the more mental aspect of BDSM. 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.