Topic: Fascination with incest?

This is a real question, and I am not trying denounce anyone, but what is with people's fascination with incest? I see incest everywhere, from this site to others, and I've always thought it was weird, but it's popular. You could look through my 18,000+ favorites, and even my uploads and find incest images in them, I personally like the nudity, and don't pay attention to the relations of the characters. What's your guy's thoughts?
I'm not asking for story time here, like "I always have found my sister to be extremely hot..." ehk, just a general question I've always been curious about.

Updated by treos