There are other books that apply math to romance, see for example the beautiful mathematicians Dr Clio Cresswell (Mathematics and sex) and Dr Hannah Fry (The Mathematics of Love). So does the world really need another book about the connections between romantic relationships and math?
First of all, these two subjects are so rich and interesting that we might just tumble into some yet undiscovered gem.
Second of all, while I admit I did not read those books, by leafing through them I got the
impression that their main goal was to attract and entertain the reader. As a byproduct they
also educate. My goal is reversed. I want to teach the basics of math in an orderly fashion,
but with words instead of numbers, little stories instead of equations, and so on.