With due respect to those people who is on a relationship with the same gender, and a royal or normal family that was into a romantic relationship with each other.  I would like to have a serious argument and also open-mindedness of the participants of this said debate.

Homosexuality and Incest were both morally, ethically, religiously, socially, and anatomically forbidden by most society.  Apparently some said that incestous relationship is worst than homosexuality because their reason is, homosexuality was only sexual preference while incest conducts sexuality which is in my concept, its invalid since homosexuality sometimes involve the said activities as incest but the difference is that it was impossible for the same gender to have a child naturally.

So this is the question:

Which is more acceptable

The poll was created at 05:49 on January 20, 2016, and so far 10 people voted.