Will incest be the new gay?

I’ve been noticing a lot of incest on television shows which is uncomfortable for me to watch. Granted that some of these shows have step-sibling incest, it isn’t so bad but what is bad is that they grew up as siblings or refer to each other as siblings. Shows like Dexter, True Blood, Game of Thrones, Boardwalk Empire, and Nip/Tuck seem to show romantic relationships.

I’m confused on whether or not I should feel sympathy for incestual couples just because like gays…it is two consending adults that want to be together. I know that the chances of birth defects are much higher when they have children which is a reason why most states ban marriages that doesn’ tmean it bans related couples to have sex. Also, does that mean we should ban those with “bad” genes of physical/mental disabilities from having kids as well?

What are your thoughts? A big part of me just can’t stand the shows that show this and I am so grossed out but a part of me says that they should have a chance to love to? A VERY small part LOL

By the way, I’m for gay marriage. I’m not a fighter or activist but if they want to get married I don’t care.