The great love of Selene was a beautiful boy, the shepherd Endymion. Selene wanted to see Endymion constantly, so she begged Nyx, the goddess of the Night, to go to Zeus and ask for help. Zeus agreed and brought Endymion into a state of eternal sleep in order to remain young beautiful forever for Selene. Selene visited Endymion daily in a cave of Mount Latmus and from their union fifty daughters were born. Their number probably corresponded to the fifty lunar months of each Olympiad.