Human Female Orgasm As Evolved Signal: a Test of Two Hypotheses
Arch Sex Behav DOI 10.1007/s10508-013-0152-7 ORIGINALPAPER Human Female Orgasm as Evolved Signal: A Test of Two Hypotheses Ryan M. Ellsworth • Drew H. Bailey Received: 24 May 2011 / Revised: 17 August 2012 / Accepted: 3 May 2013 Ó Springer Science+Business Media New York 2013 Abstract Wepresenttheresultsofastudydesignedtoempiri- Introduction cally test predictions derived from two hypotheses regarding human female orgasm behavior as an evolved communicative The question of whether the human female orgasm is an adap- trait or signal. One hypothesis tested was the female fidelity tation or a by-product of selection has been a perennial topic of hypothesis, which posits that human female orgasm signals a debate among evolutionary scientists ever since Morris (1967) woman’s sexual satisfaction and therefore her likelihood of proposed the first formal hypothesis of the function of women’s future fidelity to a partner. The other was sire choice hypothesis, orgasm. While several hypotheses on the evolved role of female which posits that women’s orgasm behavior signals increased orgasm have been formulated and some have been tested since chances of fertilization. To test the two hypotheses of human thattime(e.g.,Alcock,1980,1987;Baker&Bellis,1993;Bernds female orgasm, we administered a questionnaire to 138 females & Barash, 1979; Eschler, 2004; Hrdy, 1981; Jones, 2007; Puts, and 121 males who reported that they were currently in a roman- 2007; Puts, Dawood, & Welling, 2012; Shackelford et al., 2000; tic relationship. Key predictions of the female fidelity hypothesis Smith, 1984; Thornhill & Gangestad, 1996; Thornhill, Ganges- werenotsupported.Inparticular,orgasmwasnotassociatedwith tad, & Comer, 1995), empirical investigation of one hypothesis female sexual fidelity nor was orgasm associated with male has long been neglected.
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