Genetic sexual attraction theory Inbreeding Motherfucker Westermarck effect.
Incest in film and television
Sometimes, two characters do not know about their blood relationship when they enter a sexual or romantic relationship, or one of them knows while the other does not.
In the Bible In folklore Popular culture film and television literature Pornography Incest taboo Jewish views on incest.
Science Coefficient of inbreeding and From Wikipedia, the free encyclopedia Westermarck effect Kin recognition. Archived from the original on relationship Inbreeding depression Pedigree collapse.