Once a month the beautiful, caring, compassionate, easy-going love of your life sprouts a pair of horns, grows some fangs and makes your life a living hell. From tear-filled crying fits to bouts of extreme anger, PMS has been touted as the culprit for her monthly episodes of erratic behavior.

Is PMS really an excuse for a woman's temperamental behavior, though? At least one Canadian woman thinks so; she cited PMS as the reason for her shoplifting splurge -- an excuse that was happily gobbled up by the judge, who handed the woman an absolute discharge.

Is PMS a legitimate excuse for women's emotional outbursts and erratic behavior? Or is PMS simply a myth that women fall back on to excuse their looniness?