Human nose can sniff out gender: study

WASHINGTON: The human nose can sniff out gender from body secretions even though people don't think they smell anything, Chinese researchers reported Thursday.

Wen Zhou of the Chinese Academy of Sciences and her colleagues found that two compounds in human bodily fluids, androstadienone in males and estratetraenol in females, effectively signal masculinity and femininity, respectively, in manners contingent upon the recipients' gender and sexual orientation.