The way of a man with a maiden was too wonderful for the writer of Proverbs to understand. Preoccupying so many thoughts and dreams, the subject of countless songs, films and fairy tales, the love between a man and a woman has always been a profound and perplexing mystery. And yet we do not live happily ever after. Four out of ten marriages will end in divorce. Couples now choose to live together rather than marry, and those relationships are even...