For circumcised males, on whom the glans is mostly or completely uncovered, this technique creates more direct contact between the hand and the glans. Macrophilia is a fascination with or a sexual fantasy involving giants, more commonly expressed as giantesses . Sometimes one or more fingers may be inserted into the vagina to stroke its gay boy porn frontal wall where the G-spot may be located. Patricia Hill Collins, an African-American writer, theorizes that this is derived from a stereotype that those of black descent are promiscuous, and their buttocks are objectified by porn as a result. Internationally, hentai is a catch-all term to describe a genre of anime and manga pornography. Sadomasochism is practiced in isolation relatively rarely, though some masochists report biting, pinching, or even stun-gunning themselves as a prelude to, or as part of, masturbation. Many transgender people regard the term shemale as offensive, arguing that it mocks or shows a lack of respect towards the hentai porn gender identity and gender expression of transgender individuals; in this view, the term emphasizes the biological sex of a person and neglects their gender. Terminology for roles varies widely within the various BDSM subcultures. Bondage pornography specializes in the depiction of sexual bondage or BDSM activities as photographs, stories, movies, or drawings. Pornography in Japan is large and intertwined business of adult entertainment with unique characteristics that readily porn milf distinguish it from western pornography. In some scenes or relationships it may be impossible for consent to be withdrawn in the middle of a scene, or the bottom may have the ability to revoke consent for a relationship as a whole, but not for a particular scene. The term is typically used by the cinematographer within the narrative framework of a pornographic film, and since the 1970s has become a leitmotif of the hardcore genre. Transsexual porn star Wendy Williams has stated that transsexual Porn is classified as Straight Specialty.