They say prostitution is the oldest profession. That may be true but surely someone was drawing pictures of the encounter and someone else was laying guilt at someone's feet for doing it soon afterward.
Sex and depictions of it and people making us feel guilty about it are nothing new. Without getting into the biology of it, at our core we are concerned with two basic needs: the first is survival and and the second is procreation.
In fact I would say everything we do can be traced back to these two needs. Sometimes it's clear the connection between our actions and our two motivators and sometimes it takes some untangling of our deeds but in the end we are scratching one of the two needs.
This story is concerned with what happens when the tension between the two drives become opposing forces. Two avatars of the struggle are personified in this story.