Genetic sexual attraction refers to a sexual attraction between close relatives. Individuals who are genetically linked, but not raised together, may experience a natural affinity when they meet later in life.Adoption.com: Genetic Sexual Attraction

Psychologist Edward Westermarck postulated in 1893 that individuals who are raised together in childhood develop a natural aversion to sexual attraction to each other, perhaps as a biological protection against inbreeding.BBC News: Incest: An Age-old Taboo (March 12, 2007)

"I knew it was illegal...Of course I knew it was illegal. But so what? Emotions take over."—John Deaves, on the relationship with his daughter, JenniferGuardian: Incestuous Parents Plead: Treat Us As Normal Couple (April 7, 2008)

"John and I are in this relationship as consenting adults...We are just asking for a little bit of respect and understanding."—Jenny DeavesGuardian: Incestuous Parents Plead: Treat Us As Normal Couple (April 7, 2008)

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