The phrase buttered bun is sometimes used to refer to the owner gaysex of the orifice in question. Bestiality is illegal in many countries. A homosexual threesome would involve either three men or three women. Sexual relations between women have been illustrated as well as narrated, but much of the written material from the early modern period has been destroyed. Other objects such as ball point pens and thermometers are sometimes used, although this practice can lead to injury and/or infection. Some are aroused from wetting their diapers, others like messing their diapers. Real medical shots or videos may hentai videos violate privacy laws in some countries. However, various groups within society considered such depictions immoral, labelling them pornographic, and attempting to have them suppressed under obscenity laws, with varying degrees of success. Sigmund Freud considered foot binding as a form of fetishism. What seems clear from the historical record is that much of the lesbian material in porn milf pornographic texts was intended for a male readership. A study of 164 males in Finland from two SM clubs found that 18.2% had engaged in coprophilia; 3% as a sadist, 6.1% as a masochist, and 9.1% as both. 18% of heterosexuals and 17% of homosexuals in the study pool had tried coprophilia, showing no statistically significant difference between heterosexuals and homosexuals. Multiple men and women Bisexual pornography features one woman and two men who all perform sex acts on each other. The act may be carried out face to face, or head to tail, with the woman recommended to be on top if she has smaller breasts. Snowballing or snowdropping is the human sexual practice in which one person takes someone else semen into his or her mouth and then passes it to the mouth of the other, usually through kissing. A bisexual threesome may involve a man having sex with a man and a woman, the woman having sex with a man and a woman, or all three having sex with each other. Cum shots typically do not appear in girl-girl scenes and orgasm is normally implied by utterances, cinematic conventions, or body movement.