or a boy because being the one who penetrates was characterized as the only appropriate way for an adult male citizen to engage in sexual activity, and he was therefore considered unmanly if he was the one who was penetrated; slaves could be considered "non-citizen". Although Roman men often availed themselves of their own slaves or others for anal intercourse, Roman comedies and plays presented Greek settings and characters for explicit acts of anal intercourse, and this may be indicative that the Romans thought of anal sex as something specifically "Greek". In Japan, records (including detailed shunga) show that some males engaged in penetrative anal intercourse with males. Evidence suggestive of widespread male-female anal intercourse in a pre-modern culture can be found in the erotic vases, or stirrup-spout pots, made by the Moche people of Peru; in a survey, of a collection of these pots, it was found that 31 percent of them depicted male-female anal intercourse significantly more than any other sex act. Moche pottery of this type belonged to the world of the dead, which was believed to be a reversal of life. Therefore, the reverse of common practices was often portrayed. The Larco Museum houses an erotic gallery in which this pottery is showcased. Western cultures In many Western countries, anal sex has generally been taboo since the Middle Ages, when heretical movements were sometimes attacked by accusations that their members practiced anal sex among themselves. At that time, celibate members of the Christian clergy were accused of engaging in "sins against nature", including anal sex. The term buggery originated in medieval Europe as an insult used to describe the rumored same-sex sexual practices of the heretics from a sect originating in Bulgaria, where its followers were called ; when they spread out of the country, they were called buggres (from the ethnonym Bulgars). Another term for the practice, more archaic, is pedicate from the Latin , with the same meaning. The Renaissance poet Pietro Aretino advocated anal sex in his ('Lust Sonnets'). While men who engaged in homosexual relationships were generally suspected of engaging in anal sex, many such individuals did not. Among these, in recent times, have been André Gide, who found it repulsive, and Noël Coward, who had a horror of disease, and asserted when young that "I'd never do anything – well the disgusting thing they do – because I know I could