E. O. Wilson Quote
Women are extraordinary in lacking the estrus, or period of heat. The females of most other primate species become sexually active, to the point of aggression, only at the time of ovulation. Why has sexual responsiveness become nearly continuous? Unusually frequent sexual activity between males and females served as the principle device for cementing the pair bond.
On Human Nature (ed. Harvard University Press, 2012) - ISBN: 9780674076549
