Make what you will of this:
“Correlates of psychopathic personality traits in community couples,” Claudia Savard, Stéphane Sabourin and Yvan Lussier, Personality and Mental Health, epub March 24, 2011. The authors, at Université Laval, Québec, Canada, and Université du Québec à Trois-Rivières, Trois-Rivières, Québec, Canada, explain:
“there was a direct negative path from secondary psychopathy to couple satisfaction, but this association was partially mediated by personal distress and psychological aggression.”