For reasons yet unknown to me an informal survey of pornography sites shows an interest in incest-related categories. I don’t have the background to comment on this except to note that society’s most heinous crimes appear to have a large following in sex related sites. But then it is amazing to see how many different appetites exist. – Carlos
Disgust elicited by third-party incest: the roles of biological relatedness, co-residence, and family relationship☆
Received 25 August 2010; accepted 25 September 2011. published online 26 December 2011.Abstract
At an ultimate level of explanation, the causes of incest aversion have been linked to the reproductive costs of inbreeding, whereas at a proximate level of explanation, experienced environmental cues relating to the successful recognition of kin have been shown to moderate both the likelihood of engaging in incest and the aversion to descriptions of third-party incest. However, little is known concerning how incest aversion is moderated by evolutionarily relevant factors presented in such descriptions. As disgust has been suggested to down-regulate incestuous sexual interest, we investigated to what extent the gender, biological relatedness, co-residence, and family-relationship type of actors described in incest scenarios moderate the elicited disgust of men and women reading those descriptions. Analyzing responses from 434 participants, we found that women are more disgusted by incest than men, that descriptions of biological incest elicited more disgust than sociolegal incest, that descriptions of incest between family members having co-resided elicited more disgust than incest between family members growing up apart, and that descriptions of incest between a parent and a child elicited more disgust than incest between siblings. Our conclusion is that variations in the degree of disgust elicited by descriptions of third-party incest are consistent with evolutionary hypotheses concerning inbreeding avoidance.
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