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In data from Finland (see the [[#Finland|Finland section]]), women have become twice as likely to not have been in love with their first sex partner (from 82% down to nearly 39%) over the course of over 80 years, whereas men's answers remained unchanged around 50%.<ref>https://www.youtube.com/watch?v=qeYts4AzRUo</ref> This may reflect that young women more often are promiscuous like men, and just engage in sex for near-term gratification. But a number of other explanations are conceivable, e.g. that women's love may require a [[orgams for resources|resource dependence]]. A change in promiscuous behavior, however, is also evidenced by later-born women also more readily say they'd be willing to have sex without being in love (up from 20% to around 80%), also in the Finnish data. | In data from Finland (see the [[#Finland|Finland section]]), women have become twice as likely to not have been in love with their first sex partner (from 82% down to nearly 39%) over the course of over 80 years, whereas men's answers remained unchanged around 50%.<ref>https://www.youtube.com/watch?v=qeYts4AzRUo</ref> This may reflect that young women more often are promiscuous like men, and just engage in sex for near-term gratification. But a number of other explanations are conceivable, e.g. that women's love may require a [[orgams for resources|resource dependence]]. A change in promiscuous behavior, however, is also evidenced by later-born women also more readily say they'd be willing to have sex without being in love (up from 20% to around 80%), also in the Finnish data. | ||
== Are late marriage and reproduction unnatural? == | === Are late marriage and reproduction unnatural? === | ||
Historical data on age of marriage and reproduction suggests that late first marriages and late reproduction were not unheard of in history, especially in k-selected societies. Evidence from Sweden and Canada suggest the [[boomer]] generation was an outlier with particularly early marriages and reproduction.<ref>https://commons.wikimedia.org/wiki/File:2017_Sweden_mean_age_at_marriage_1871-2016-sv.png</ref><ref>https://www150.statcan.gc.ca/n1/pub/11-630-x/11-630-x2014002-eng.htm</ref> In Denmark, the current mean age at first birth of 29 is comparable to the 1850s.<ref>https://www.ejog.org/article/S0301-2115(19)30407-5/fulltext</ref> | Historical data on age of marriage and reproduction suggests that late first marriages and late reproduction were not unheard of in history, especially in k-selected societies. Evidence from Sweden and Canada suggest the [[boomer]] generation was an outlier with particularly early marriages and reproduction.<ref>https://commons.wikimedia.org/wiki/File:2017_Sweden_mean_age_at_marriage_1871-2016-sv.png</ref><ref>https://www150.statcan.gc.ca/n1/pub/11-630-x/11-630-x2014002-eng.htm</ref> In Denmark, the current mean age at first birth of 29 is comparable to the 1850s.<ref>https://www.ejog.org/article/S0301-2115(19)30407-5/fulltext</ref> | ||