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Encyclopedia > Sexy son hypothesis

The sexy son hypothesis is a concept from evolutionary biology, proposed by P. J. Weatherhead and R. J. Robertson in 1979. [1] It posits that a female animal's optimal choice among potential fathers is a male whose genes will produce male offspring with the best chance of reproductive success. In particular, the sexy-son hypothesis implies that a potential mate's capacity as a caregiver is irrelevant to his value as potential father of the female's offspring. Evolutionary biology is a subfield of biology concerned with the origin and descent of species, as well as their change, multiplication, and diversity over time. ... For the song by the Smashing Pumpkins, see 1979 (song). ... In biology, offspring are the product of reproduction, a new organism produced by one or more parents. ... Reproductive success is defined as the passing of genes onto the next generation in a way that they too can pass those genes on. ... Caregiver may refer to: A voluntary caregiver An assisted living situation A nursing home A hospice care situation Category: ...

The sexy son hypothesis has been suggested as the origin of some aspects of human sexual behavior. In particular, it has been shown that human females are more attracted to traditionally masculine men ("cads") during the most fertile times of their menstrual cycles, and more attracted to relatively feminine men ("dads") during the remainder of the cycle. [2] These observations have led to the controversial conclusion that women's infidelity is natural, and evolutionarily advantageous, on the grounds that it will enable them to secure both the best genes and the best caregiver for their offspring. This article is about sex acts and practices (i. ... The word masculine can refer to: the property of being biologically male masculinity, a traditionally male gender role the masculine grammatical gender This is a disambiguation page — a navigational aid which lists other pages that might otherwise share the same title. ... Fertility is a measure of reproduction: the number of children born per couple, person or population. ... Menstrual cycle The menstrual cycle is a recurring cycle of physiological changes in the females of some animal species that is associated with reproductive fertility. ... Look up feminine in Wiktionary, the free dictionary. ... A graphical representation of the normal human karyotype. ...

A version of the sexy son hypothesis has also been invoked in explaining the popularity of the "hot wife" phenomenon among swingers. [3] Swinging, sometimes referred to in North America as the swinging lifestyle, is non-monogamous sexual activity, treated much like any other social activity, that can be experienced as a couple. ...


  1. ^ Weatherhead, P. J., and R. J. Robertson. 1979. Offspring quality and the polygyny threshold: 'The sexy son hypothesis'. Am. Nat. 113:201-208.
  2. ^ http://news.bbc.co.uk/2/hi/science/nature/376321.stm
  3. ^ http://www.moderndirections.com/tic_letter22.htm#wifewith



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