The anus has a relatively high concentration of nerve endings and can be an erogenous zone, and the receiver may receive pleasure from external anal stimulation. Also see POV. Others involve partners who naturally have a significant difference in size. Pornographic films are generally classified into sub-genres which describe the sexual fantasy which the film and actors attempt to create. Squirt pornography involves women ejaculating. When all regions of the face are included, facial cum shots comprise approximately 62% of scenes where external ejaculation occurs. Bukkake videos are a relatively lesbian hentai prevalent niche in contemporary pornographic films. Arousal may be triggered by seeing the body movements or facial expressions of that person. Yiff or Yiffy pornography features Furry or anthropomorphic animals in an erotic or sexual context. Discipline often incorporates sadomasochistic aspects, though some sadomasochists distance themselves from D/s practices such as punishment. Bukkake pornography usually depicts numerous men having sex with one woman, with multiple, usually gay boy porn 10 or more, men ejaculating on the female face. Making a pearl necklace is one of the activities that sex workers use as safe sex alternatives for people who refuse to wear condoms. Pegging is a recently invented word which features a woman penetrating a man with a strap-on dildo. Asian people or Asiatic people are people who descend from a portion of Asia population. RACK may be seen as focusing primarily upon awareness and momsex informed consent, rather than accepted safe practices. The person sat upon may be in bondage, sexually submissive, or simply held down by the body-weight of the other person. Through the 1990s, mainstream movie and television actors have been more willing to portray homosexuality, as the threat of any backlash against their careers has lessened and society acceptance of gay and lesbian people has increased. As in B/D, the declaration of the Top/Bottom may be required, though sadomasochists may also play without any Power Exchange at all, with both partners equally in control of the play.