So I keep adding this qualification: “when incest is a violation,” suggesting that I think that there may be occasions in which it is not. Why would I talk that way? Well, I do think that there are probably forms of incest that are not necessarily traumatic or which gain their traumatic character by virtue of the consciousness of social shame that they produce.

Judith Butler (Jewish philosopher) “Undoing Gender”, 2004 (Butler’s work had major influence on feminist and queer scholarship)