What Do Women Want?
http://www.zeit.de/lebensart/partnerschaft/2014-01/polygamie-bei-frauen
http://www.welt.de/icon/article124030369/Von-wegen-Monogamie-was-Frauen-wirklich-wollen.html
http://www.nytimes.com/2013/06/16/books/review/what-do-women-want-by-daniel-bergner.html
http://www.researchgate.net/publication/11324580_Sexual_motivation_and_the_duration_of_partnership