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Useful Notes / Westermarck Effect

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In short, you're less likely to be attracted to someone of your preferred gender if you both grew up together. The Westermarck Effect is commonly brought up in the midst of shipping arguments shipping discussions where incest, cousins, and childhood friends are involved. A form of reverse sexual imprinting, the Westermarck Effect serves to suppress inbreeding in humans, working in opposition to the theorized genetic sexual attraction phenomenon. The following factors are known to be involved:

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