“Criminal law is not the appropriate means to preserve a social taboo,” the German Ethics Council said in a statement. “The fundamental right of adult siblings to sexual self-determination is to be weighed more heavily than the abstract idea of protection of the family.”
http://www.telegraph.co.uk/news/worldnews/europe/germany/11119062/Incest-a-fundamental-right-German-committee-says.html
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From that statement the very existence of the word "taboo" should be banned, so are the rights of a new born, created in purpose to be a freak of nature, to have the rest of his life questioned.
Is polygamy still a taboo in Germany?