Even though it really is theoretically possible that organic selection could, less than specific genetic situation, find for individuals that instinctively prevent mating with (close) kinfolk, incest will however exist within the gene pool because even genetically weakened, inbred people are improved watchposts towards predators than none in the least, https://spencermliez.webbuzzfeed.com/28674954/mother-fuck-son-jav-fundamentals-explained