Havasu Study
 

A study at Lake Havasu showed that the kind of male face a woman finds attractive can differ depending on where she is in her menstrual cycle.
For instance, if she is ovulating she is attracted to men with rugged and masculine features.
And if she is menstruating, she is more prone to be attracted to a man with scissors shoved in his temple and a bat jammed up his a$$ while he is
on fire.

Further studies are expected.