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Research conducted over the last fifteen years has placed in question many of the traditional conclusions about the evolution of human female sexuality. Women have not lost estrus, as earlier researchers thought, but it is simply concealed, resulting in two functionally distinct sexualities with markedly different ends in each phase. At the fertile phase of the cycle, women prefer male traits that may mark superior genetic quality, and at infertile phases, they prefer men willing to invest resources in a mate. Thus, women's peri-ovulatory sexuality functions to obtain a sire of superior genetic quality, and is homologous with estrus in other vertebrates. This model sheds light on male human sexuality as well: men perceive and respond to women's estrus, including by increased mate guarding. Men's response is limited, compared to other vertebrate males, implying coevolutionary history of selection on females to conceal estrus from men and selection on men to detect it. Research indicates that women's concealed estrus is an adaptation to copulate conditionally with men other than the pair-bond partner. Women's sexual ornaments-the estrogen-facilitated features of face and body-are honest signals of individual quality pertaining to future reproductive value.

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Book Details

ISBN: 9780195340983
ISBN-10: 0195340981
Format: Hardback
(241mm x 162mm x 27mm)
Pages: 424
Imprint: Oxford University Press Inc
Publisher: Oxford University Press Inc
Publish Date: 25-Sep-2008
Country of Publication: United States


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Author Biography - Randy Thornhill

Randy Thornhill is the Distinguished Professor of Biology at the University of New Mexico. He received his PhD in zoology from the University of Michigan in 1974. His research and teaching are in evolutionary biology, particularly the evolution of animal social life. Steven W. Gangestad is the Distinguished Professor of Psychology at the University of New Mexico. He received his PhD in 1984 from the University of Minnesota. His primary research is in evolutionary psychology and social/personality psychology. His general interests concern the ways in which humans' current psychological design is a product of evolutionary selection, and current research involves this issue in regard to phenomena that occur within close relationships such as sexual relationships, friendships, and familial relationships. Other research concerns the developmental expressions of adaptations.

Books By Author Randy Thornhill

Evolutionary Biology of Human Female Sexuality by Randy Thornhill

The Evolutionary Biology of Human Female Sexuality

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