Probably, the difficulty of the man - woman relationship is the most important concern in the lives of most people. There are no simple rules and the only way comprises the general assessment of the horoscopes (personalities) of the two people involved. This is followed by an assessment of the cross-aspects between their natal charts, coupled with the assessment of the resulting planetary ‘relocations’ to the ‘Houses’ of the other person’s charts. Four examples of ‘synastry’ exercises are presented: two control ones, of couples well-known to the author, and then two examples of world-famous couples, namely the Duke and Duchess of Windsor, plus the actor Richard Burton and the actress Elizabeth Taylor. The book’s final chapter presents the promising and useful results obtained from all the four exercises.