Taboo 1 (1980)
Taboo II (1982)
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Taboo 23 (2007)
http://en.wikipedia.org/wiki/Taboo_(film_series)
People this theme is nothing new. Why all the fuss and moral outrage?
Some of you are very much confusing fantasy with reality.
fantasy -- a movie about other people comitting incest, or someone watching said movie and enjoying the fantasy of it.
Reality -- equating said incest movie to someone's own family, assuming someone must be into their own family members because they watched and liked incest porn.
Confusing reality with fantasy and vice-versa is never a good thing. Ever.
Don't argue, think about it.