I'm affected by the moon, and during that time, if I wash my facial hair, I can't do a THING with it!
Seriously, our bodies are comprised mainly of water, and it's known that the moon affects the gravitational pull of the tides. Women's bodies are also affected by monthly cyclical circles, and to a lesser degree so are mens. Women's periods often occur at or roughly during the time of the full moon, and there are ancient pagan legends that liken the moon to a goddess, with the waning, full and waxing phases of the moon being likened to the stages of ovulation and menstruation and also the three ages of woman - maid, mother and crone. Whether it's psychological or otherwise, I seem to be at my most creative at the time of the full moon.