"384"^^ . . "Sex at Dawn"@en . "978-0-06-170780-3" . "HQ12 .R93 2010" . "2010-06-29Z"^^ . . . "Sex at Dawn: The Prehistoric Origins of Modern Sexuality is a book dealing with the evolution of monogamy in humans and human mating systems. First published in 2010, it was co-authored by Christopher Ryan, PhD and Cacilda Jeth\u00E1, MD (Portuguese pronunciation: [k\u0250\u02C8si\u026B\u00F0\u0250 \u0292\u0268\u02C8ta]). In opposition to what the authors see as the 'standard narrative' of human sexual evolution, they contend having multiple sexual partners was common and accepted in the environment of evolutionary adaptedness."@en . . .