A look inside Instant Chemistry's book - The Love Manual: Making and Keeping a Connection.  This book explains your DNA results in an easy-to-understand and meaningful way through anecdotal stories with a psychological perspective.  This book is meant to provide meaningful information for your relationship.

For years scientists have tried to uncover the mystery of human attraction. While there is still mystery, one important part of human attraction has been discovered and it resides in our genes. Two people with different immunity genes find each other more irresistible than two people with the same immunity genes. This even happens in animals like mice and fish. They do this by using their highly sensitive nose to figure out if a potential mate has similar of different immunity genes than themselves. But if our sense of smell is not as sensitive as a fish or mouse is smell really part of human attraction? Turns out it is!