Genetic sexual attraction

Genetic sexual attraction is a label for reported sexual attraction between close biological relatives who meet as adults after childhood separation, often through adoption. It is not a formal psychiatric diagnosis or an established biological syndrome.

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Westermarck effect: The hypothesis that close childhood co-residence reduces later sexual attraction between people. It predicts reduced attraction after early co-residence, unlike accounts of attraction after relatives meet as adults.
Empirical research: Systematic investigation that gathers observations or measurements to evaluate claims. Reliable estimates require methods beyond selected reunion stories and informal reports.
Adoption reunion: The renewed contact between an adopted person and birth relatives, often after reaching adulthood. Adult reunions are a commonly described setting for reports associated with this label.
Incest taboo: A widespread social prohibition against sexual relationships between close relatives. Reported attraction occurs against strong legal and cultural prohibitions on incest.
Sexual imprinting: A proposed process in which early experience shapes later preferences for sexual partners. It offers one framework for discussing how childhood exposure might shape adult attraction.
Case report: A detailed account of an individual or small number of cases, usually without a comparison group. Many claims about this phenomenon come from personal histories that cannot establish prevalence or cause.
Closed adoption: An adoption arrangement in which identifying information or contact between birth and adoptive families is restricted. Restricted early contact can make later discovery and reunion especially consequential.
Consanguinity: Biological relatedness through shared ancestry, especially between people who may reproduce together. Close biological relationships can raise inherited-disease risks if a relationship results in reproduction.
Familiarity principle: The tendency for repeated exposure to increase liking or preference under some conditions. Some accounts invoke familiarity, though childhood separation complicates that explanation.
Confirmation bias: The tendency to seek, interpret, or remember evidence in ways that support existing expectations. A vivid label may shape how people interpret complicated feelings after discovering kinship.