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Age disparity in sexual relationships and sexual relationships between individuals of a significant difference in age have been documented for most of recorded history and have been regarded with a wide range of attitudes, from normalized acceptance to taboo. Concepts of these relationships and of the exact definition of a "significant" age disparity have developed over time and vary between societies, legal systems (particularly with regards to the age of consent), and ethical systems. These views are rarely uniform even within cultures and are affected by views of consent, marriage, and gender roles, and by perceptions of social and economic differences between age groups. Marriage between partners of roughly similar age is known as "age homogamy".〔 ==Statistics== Data in Australia and United Kingdom show an almost identical pattern. Relationships with age disparity of all kinds have been observed with both men and women as the older or younger partner. In various cultures, older men and younger women often seek one another for sexual or marital relationships. Older women sometimes date younger men as well, and in both cases wealth and physical attractiveness are often relevant. Nevertheless, because men generally are interested in women in their twenties, adolescent boys are generally sexually interested in women somewhat older than themselves. Most men marry women younger than they are; with the difference being between two to three years in Spain, with the UK reporting the difference to be on average about three years, and the US, two and a half. The pattern was also confirmed for the rest of the world, with the gap being largest in Africa. A study released in 2003 by the United Kingdom's Office for National Statistics concluded that the proportion of women in England and Wales marrying younger men rose from 15% to 26% between 1963 and 1998. The study also showed a higher divorce rate as the age difference rose when the woman was older and a lower divorce rate as the age difference rose when the man was older. A 2008 study, however, concluded that the difference is not significant.〔Ben Wilson and Steve Smallwood, "Age differences at marriage and divorce", ''Population Trends'' 132, Summer 2008, Office for National Statistics ()〕 In August 2010, Michael Dunn of the University of Wales Institute, Cardiff completed and released the results of a study on age disparity in dating. Dunn concluded that "Not once across all ages and countries ... did females show a preference for males significantly younger than male preferences for females" and that there was a "consistent cross-cultural preference by women for at least same-age or significantly older men". A 2003 AARP study reported that 34% of women over 39 years old were dating younger men. A 2011 study suggested that age disparity in marriage is positively correlated with decreased longevity, particularly for women, though married individuals still have longer lifespans than singles. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Age disparity in sexual relationships」の詳細全文を読む スポンサード リンク
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