
A nubile female virtually never experiences difficulty in finding willing
sexual partners, and in a natural habitat nubile females are probably always
married.  The basic female "strategy" is to obtain the best possible husband,
to be fertilized by the fittest available male (always, of course, taking
risk into account), and to maximize the returns on sexual favors bestowed:
to be sexually aroused by the sight of males would promote random matings,
thus undermining all of these aims, and would also waste time and energy
that could be spent in economically significant activities and in nurturing
children.  A female's reproductive success would be seriously compromised
by the propensity to be sexually aroused by the sight of males.
		-- Donald Symons, "The Evolution of Human Sexuality",
		   attempting to explain the lack of female interest in
		   pornography.
