| | Why Women Have Sex Received 12 November 2009; accepted 16 November 2009. published online 04 February 2010. University of Houston, Houston, TX, USA PII: S1090-5138(09)00123-8 doi:10.1016/j.evolhumbehav.2009.11.002 © 2010 Elsevier Inc. All rights reserved. | 
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