Klaus Kinski and Isabelle Illiers in The Fruits of Passion
Klaus Kinski, (1926-1991) was an actor famed for his intense performances in films such as Werner Herzog's Aguirre: The Wrath of God, Nosferatu the Vampyre, and Woyzeck. In his autobiography, Kinski Uncut, he portrays himself as a brooding sexual megalomaniac, although much of it may have been exaggerated to boost sales.
I don't know the exact source of this quote.
I agree, however, that our perversions are likely more true than our virtues.