The "honeymoon " was a period of a lunar month after a marriage where the couple would traditionally partake of a mead or Honey beer as part of the ritual to promote fertility.
a moon made of honey?
It is suppose to be the sexual celebration of virginity within marriage (possibly the beginning of life).. I think that got a little jacked up along the way like all the rest of the rituals. (Christmas, Easter, etc,etc, etc)