Abstract
A reportedly wise man once mused about four amazing things that he could not fully explain or understand; the ability of a bird to fly, a ship to float, a snake to move, and the way of a man with a woman.1Today we can happily cite the science of physics to explain the first three questions, yet it remains challenging to answer that fourth one because “for many people, sex remains an unsolved puzzle.”2 What exactly is that last question about anyway? Is it simply as St Augustine3described “the unclean motion of the generative parts” or is it better explained by Potts and Short4as “the behavioural combination of culture and biology that dominates our thoughts ... and drives forward the major part of our lives [?]”