Maybe women are more attuned to the moon cycles. Before the pill, a \"normal\" menstruation cycle used to be 28 days, and the amazing thing was that many women used to menstruate during the full moon period. Native American women had their moon lodge were they used to go during that time. Same stories can be read about women from other native people in other countries. Now with the pill, it seems women are not as synchronised with the moon anymore.

Oh, and just pay attention to traffic on a full moon day! :-) you know all those lunatics loose in cars.