In the pursuit to understand the overwhelming force that we call love and the mechanics it employs A Treatise on Lust and Illusion examines how it is social labels are employed and have evolved, what it means to be moral in a relationship, why some get married, why some do not, why relationships fail, why promiscuity is the cornerstone of men's existence, why casual sex is necessary, why we should be cautious of poachers, when and why we should end our relationships and how it is illusion plays a key role in love.