Whoever takes a second wife in addition to his first one shall divorce the first and pay her kettubah Yevamot 65a Roman customs, which prohibited polygamy, may have enhanced such an attitude[ original research? A separate review of 17 studies by Bellis, Hughes, Hughes, and Ashton found slightly higher rates sex mates in Greece Mature extrapair paternity. The amount of extramarital sex by women is described as "universal" in 6 cultures, "moderate" in 23 cultures, "occasional" in 9 cultures, and "uncommon" in sex mates in Greece Mature cultures. Friedrich Engels stated that compulsory monogamy could only lead to increased prostitution and general immorality, with the benefits of restricting capital and solidifying the class structure. In order "to build a house" a man was supposed to marry one woman and if she did not provide him with offspring, he could take a second wife. Some sages condemned marriage to two wives even for the purpose of procreation Ketubot 62b. People's Republic of China[ edit ] Main article: For example, anthropologist Jack Goody 's comparative study utilizing the Ethnographic Atlas demonstrated that monogamy is part of a cultural complex found in the broad swath of Eurasian societies from Japan to Ireland that practice social monogamy, sexual monogamy and dowry i. Rates of extrapair paternity have not been extensively studied in people.