9 Females that prefer long tailed males tend to have mothers that chose long-tailed fathers.
Page needed von Schantz T, Bensch S, Grahn M, Hasselquist D, Wittzell H (January 1999).
In most sexual species the males and females have different equilibrium strategies, due to a difference in west sussex minerals local plan relative investment in producing offspring.
Modern interpretation edit The sciences of evolutionary psychology, human behavioural ecology, and sociobiology study the influence of sexual selection in humans.Since the agricultural revolution, the penis has continued to serve as symbol of male dominance.Wilson, Mary F (June 1979).These preferences may arise when an arbitrary female preference for some aspect of male morphology initially, perhaps, a result of genetic drift creates, in due course, selection for males with the appropriate ornament.All other male primates have a baculum, or penis bone, which keeps it stiff for penetration.Anchor isbn X Gould, Stephen.Isbn Sexual Selection Costs Compensations Archived at the Wayback Machine." Comparative evidence for the evolution of genitalia by sexual selection Archived at the Wayback Machine." Nature 393.6687 (1998 784.Ronald Fisher in a letter to Charles Galton Darwin, 22 November 1932, cited in Fisher,.For the artificial selection of the sex of offspring, see sex selection.Cambridge University Press, New York,.So much attention to the penis has inevitably created a great deal of tension and anxiety around.Bright colourations and showy ornamenations, such as those seen in many male birds, in addition to capturing the eyes of females, also attract the attention of predators.Extreme sexual size dimorphism, with females larger than males, is quite common in spiders and birds of prey.Can a casual sexual relationship exact an emotional toll?Bright colors that develop in animals during mating season function to attract partners.22 However, sexual selection can also do the opposite, driving species divergence - sometimes through elaborate changes in genitalia - such that new species emerge.We should be careful not mistake this for the relatively minor differences in penis size among individual men it is not a simple formula of the bigger the better.But then it gets you thinking: You're single, too what could be so bad about a casual night in bed with someone you like but don't love?