Westermarck effect

The Westermarck effect was discovered by anthropologist Edward Westermarck. When two people live in close domestic proximity[?] during the first 30 months[?] in the life of either one, both are desensitized to later close sexual attraction and bonding.

Freud argued that members of the same family lust for one another, making it necessary for societies[?] to create incest taboos, but Westermarck argued that incest taboos arise naturally as products of response mediated by a relatively simple inherited epigenetic rule, namely the Westermarck effect.