In a shocking new study out of Japan, scientists had men smell women’s armpits — and discovered that their body odor could subtly sway male behavior, even helping them relax. But the effect only kicked in at certain times of the month, when the men found the scent more appealing — and the women’s faces suddenly looked a whole lot cuter to the guys doing the sniffing. Previous research has shown that women’s body odor changes throughout the menstrual cycle, with men often finding it more appealing around ovulation, when fertility peaks. Using high-tech chemical analysis, researchers at the University...