Maybe you've seen that television commercial in which a woman walks up to a line of grocery carts on the sidewalk outside the store and tries to pull one free.  Within seconds she is so frustrated that she begins smashing her cart into the others over and over again.  I think most women who've experienced the irritability associated with PMS (Pre-Menstrual Syndrome) will chuckle as I did, seeing a bit of themselves in that scene  The ad was actually meant to promote the use of a popular antid...