WHAT IS GSA?
Genetic Sexual Attraction (GSA) is a term that describes the phenomenon of sexual attraction between close relatives, such as siblings, first and second cousins or a parent and offspring who first meet as adults.
It is not the same as incest, though this is what it is called if a sexual relationship is then entered into.
The term GSA was coined 30 years ago by American Barbara Gonyo. She wrote a book about the lust she felt for the adult son she had given up for adoption 26 years earlier. She never acted on her feelings.
GSA is rare between people raised together in early childhood due to a reverse sexual imprinting known as the Westermarck effect, which desensitizes them to sexual attraction. Experts believe that this effect evolved to prevent inbreeding.
