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Old 09-24-2012, 04:38 AM
njtt njtt is offline
Join Date: Jul 2004
Location: U.K.
Posts: 12,068
Originally Posted by Derleth View Post
The Westermarck Effect is usually cited here, as is its slightly lesser-known inverse, genetic sexual attraction. In brief, the Westermarck Effect prevents people who were raised together, regardless of genetic similarity, from becoming attracted to each other, whereas genetic sexual attraction is the effect whereby two closely-related people who were not raised together have a higher chance of being attracted to each other assuming their genders and sexualities are compatible.
The Westermarck Effect is rather different from the incest taboo, though. The former is about people raised together (regardless of kinship) not wanting to have sex with each other. The latter is about third parties, or a society as a whole, disapproving when closely related people (regardless of whether they were raised together) do have sex.

The fact that it turned out that unrelated, opposite-sex kids raised together in kibbutzim turned out not to have much sexual interest in one another was probably quite a disappointment to the original, idealistic kibbutz leaders.