A study conducted by UCLA's Department of Psychiatry has revealed
that the kind of face a woman finds attractive on a man can differ
depending on where she is in her menstrual cycle.

For example: If she is ovulating, she is attracted to men with
rugged and masculine features. However, if she is menstruating or
menopausal, she tends to be more attracted to a man with duct tape
over his mouth and a spear lodged in his forehead while he is on

No further studies are expected.