A number of explanations have been given for the universal nature of the incest taboo in all cultures,including all of the following except:

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The nuclear family exclusion theory is not a commonly accepted explanation for the universal nature of the incest taboo. The other options - natural aversion theory, family disruption theory, inbreeding theory, and the theory of expanding social alliances - are all popular theories commonly used to explain the taboo.

A Number of Explanations Have Been Given for the Universal