The Greek moon goddess Selene (known by the Romans as Luna, as in lunatic and lunacy, the madness brought on by the full moon) was very beautiful, long, white, and smooth. She fell in love with a gorgeous young shepherd named Endymion and seduced him. Selene asked Zeus to grant her lover one wish and Endymion wished to sleep forever so that he would not age. His wish was granted and Selene visited him every night. It seems that this arrangement worked out quite well---the pair had fifty daughters. No wonder the moon is associated with fertility.
A simple story that's given rise to some wonderful paintings, like this one by Victor Florence Pollet, 'Endymion and Selene', 1850-60.







