A woman's tears can be a total turnoff for a guy — if he smells them, that is.
Men who sniffed the tears of weeping women produced less testosterone and found female faces less arousing, according to new research that suggests a novel evolutionary explanation for why humans cry.
Communication isn't limited to language, said neuroscientist Noam Sobel of the Weizmann Institute of Science in Rehovot, Israel, whose study was published online Thursday by the journal Science. "And here, we've uncovered the chemical word for 'no,' or 'not now.' "
Emotional tears previously had been shown to be chemically distinct from reflexive, eye-protecting tears. And in animals, tears are known to convey important messages: Male mice that cry attract females, and blind mole rats that weep ward off other males.