Research on the subject suggests that somewhere, somehow our squirmy reaction to incest can be expressed genetically. Because of natural selection and all that blah blah, it’s thought that there exists a biomechanism that triggers incest avoidance in humans. Well, it looks like some very bold scientists have found a solid starting point for furthur research: lemur hoo-ha’s.
Christine Drea, Marylene Boulet, and Marie Charpentier from Duke University carefully obtained genital gland secretions from 17 sexually mature female ring-tailed lemurs.
Side note: most species of lemurs live in completely female dominated societies. The only other mammal to consistently do the same is the hyena.
Those samples were compared to previously gathered samples from 19 males. Turns out they found the first molecular evidence of relatedness markers in the gland secretions. The scents of the lemur hoo-ha’s were more similar the more closely related they were, thus providing a biomechanism to tell the lemurs who to wink at, and who not to.
The whole article can be found on the BMC website.
And I thought it was my brother’s bathing and eating habits.