S-Sorawo PLEASE! First you're all
"Why are you so fixated on another girl when you have me by your side."
and now you're
"Why are you so clingy today, its like you're my boyfriend or something? It's weird."
How are you so dense!
I think it's just that incest is a rare topic compared to those other things, you don't really see incest plots unless you're looking for them. Because of the scarcity it's perceived as "worse" than those other things, or people just aren't as desensitized to that topic in media as those other...