The phrase buttered bun is sometimes used to refer to the owner of the orifice in question. A study of the condom usage habits of New Zealand sex workers said that they offered various safe sex alternatives to vaginal sex to clients who refused to wear a condom. Women oriented pornography is sometimes referred to as sex positive pornography. Pornography may fall into more than one genre. Yaoi is anime or manga that features gay males . Two women tapegagged and cuffed to iron bars Bondage and Discipline are two aspects of BDSM that do not seem to relate to each other because of the type of activities involved, but they have conceptual similarities, and that is why they appear jointly. Diaper fetishism is totally independent from gay hentai pedophilia as the wearer derives pleasure only from the diaper and/or use of it. What seems clear from the historical record is that much of the lesbian material in pornographic texts was intended for a male readership. It contains graphic sexual activity and visible penetration. Sexual orientation Pornography features an increasing variety of combinations of actors by their sexual orientation such as lesbian, gay, bisexual, and transsexuals in addition momporn to traditional heterosexual roles. Throughout history, women have not had the same freedom or independence to pursue homosexual relationships as men, but neither have they met the same harsh punishment as homosexual men in some societies. Masturbation is the self-sexual stimulation of the genitals for sexual arousal or other sexual pleasure, usually to the point of orgasm. Internationally, hentai is a catch-all term to describe a genre of anime and manga pornography. Reality and voyeur pornography, animated videos, and legally prohibited acts also influence the classification of pornography. They may regard it as an enhancing element of their sex lives or as their primary gay cock form of sexual activity. Hermaphrodite, also known as herm, refers to pornography, typically hentai, that features persons with the genitalia of both sexes.