Something doesn't have to be genetic for it to be innate. A lot can go wrong in the interim which leads to all sorts of differences in people from poor vision (ever worn glasses?) to possibly even homosexuality. Maybe the parasite thing holds up but I'll need to see some evidence.
Something doesn't have to be genetic for it to be innate. A lot can go wrong in the interim which leads to all sorts of differences in people from poor vision (ever worn glasses?) to possibly even homosexuality. Maybe the parasite thing holds up but I'll need to see some evidence.