I had this weird thought which I probably got from somewhere but don't remember where.
:::How PMS is related to the moon:::
When the moon is full, it's at its most reflective and receptive state. (It reflects back the sun's light the most.) So when you're PMSing, you are much more receptive - thus, what you send out to the world is also more intense, because you become that much more REFLECTIVE.
So, next time you're PMSed, blame your receptive femininity.