User blog comment:Samuelshadow16/Ruby's hidden lover/@comment-50.197.190.126-20130923054608/@comment-4010415-20160121021605

Incest is considered creepy these days because of the fact that it was made taboo. It was made taboo because incest tends to lead to genetic problems in the offspring, so it's considered unhealthy. Even if you're talking about an incestuous relationship between two people of the same sex, it's still considered unhealthy, especially considering that people tend to associate incest with leading to bad mental health in one way or another.