Incest avoidance is a cultural universal. Consensual sexual relations between brothers and sisters who grew up together are very rare. The same is true for individuals who have known eachother throughout their early childhood but are not biologically related. This is the Westermarck Effect and it's likely that this has developed to suppress undesirable inbreeding.
It appears then that if the Westermarck Effect didn't exist, we would be very attracted to our siblings - hence the phenomenon of genetic sexual attraction in reunited relations.
Perhaps we naturally seek-out sexual partners who have a lot in common with us. Seems a bit counter-intuitive to me, but hey.
It appears then that if the Westermarck Effect didn't exist, we would be very attracted to our siblings - hence the phenomenon of genetic sexual attraction in reunited relations.
Perhaps we naturally seek-out sexual partners who have a lot in common with us. Seems a bit counter-intuitive to me, but hey.
