Libido is correlated with the menstrual cycle so that many women experience an increase in sexual desire several days immediately before ovulation. Testosterone levels rise gradually from about the 24th day of a woman's menstrual cycle until ovulation on about the 14th day of the next cycle.  Pathological overactivity of the dopaminergic mesolimbic pathway in the brain—forming either psychiatrically, during mania, or pharmacologically, as a side effect of dopamine agonists, specifically D3-preferring agonists—is associated with various addictions and has been shown to result among some subjects of either sex in overindulgent, sometimes hypersexual, behavior   .
Libido is correlated with the menstrual cycle so that many women experience an increase in sexual desire several days immediately before ovulation. Testosterone levels rise gradually from about the 24th day of a woman's menstrual cycle until ovulation on about the 14th day of the next cycle. During the high-testosterone period before ovulation, a woman typically feels more attracted to masculine facial features and is more likely to pursue short-term mating. Pathological overactivity of the dopaminergic mesolimbic pathway in the brain—forming either psychiatrically, during mania, or pharmacologically, as a side effect of dopamine agonists, specifically D3-preferring agonists—is associated with various addictions and has been shown to result among some subjects of either sex in overindulgent, sometimes hypersexual, behavior . Polyandrous mating is positively correlated with testicle-to-body weight across bushcricket taxa (see Sperm competition). Human testicles, relative to body weight, are lighter than those of the chimpanzee genus (Pan) but heavier than those of gorillas (Gorilla) and orangutans (Pongo). The bonobo chimpanzee species (Pan paniscus) has heavier testicles than the chimpanzee species (Pan troglodytes). It is yet unclear whether the rule is as applicable within species as it is across species—that is, whether it is applicable across races—but according to a study by J. Philippe Rushton, Caucasoid averages (21 g) are about twice as heavier as the Oriental standard (9 g) .
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During the high-testosterone period before ovulation, a woman typically feels more attracted to masculine facial features and is more likely to pursue short-term mating.
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Polyandrous mating is positively correlated with testicle-to-body weight across bushcricket taxa (see Sperm competition). Human testicles, relative to body weight, are lighter than those of the chimpanzee genus (Pan) but heavier than those of gorillas (Gorilla) and orangutans (Pongo). The bonobo chimpanzee species (Pan paniscus) has heavier testicles than the chimpanzee species (Pan troglodytes). It is yet unclear whether the rule is as applicable within species as it is across species—that is, whether it is applicable across races—but according to a study by J. Philippe Rushton, Caucasoid averages (21 g) are about twice as heavier as the Oriental standard (9 g)