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Conclusion: Young people generally have less sex and men even less. Also few people have more sex at the same time, without resulting in a net increase though. But the largest changes are less stable relationships and later marriage for both sexes rather than alpha males hoarding all women. Humans being a moderately polygamous species, the tendency that men are more likely sexless can be observed across the world as summarized below and also in terms of [[reproductive success]],<ref>Brown, G.R., Laland, K.N. and Mulder, M.B. 2009. ''Bateman's principles and human sex roles.'' [[https://www.sciencedirect.com/science/article/pii/S0169534709001128 FullText]]</ref> and is likely a result of women's higher [[Bateman's principle|parental investment]]. | Conclusion: Young people generally have less sex and men even less. Also few people have more sex at the same time, without resulting in a net increase though. But the largest changes are less stable relationships and later marriage for both sexes rather than alpha males hoarding all women. Humans being a moderately polygamous species, the tendency that men are more likely sexless can be observed across the world as summarized below and also in terms of [[reproductive success]],<ref>Brown, G.R., Laland, K.N. and Mulder, M.B. 2009. ''Bateman's principles and human sex roles.'' [[https://www.sciencedirect.com/science/article/pii/S0169534709001128 FullText]]</ref> and is likely a result of women's higher [[Bateman's principle|parental investment]]. | ||
=== | ===Other estimates=== | ||
[[File:Lymanstone.png|350px|right|thumb|]] | [[File:Lymanstone.png|350px|right|thumb|]] |