“…Studies investigating each trait separately have found positive assortative mating for narcissism in initial attraction, as well as in established relationships (Grosz, Dufner, Back, & Denissen, 2015;Keller et al, 2014;Lamkin, Campbell, & Miller, 2015). Others have found similarity in psychopathy and anti-social behaviour in initial attraction (Blanchard, Lyons, & Centifanti, 2016) and in couples (Boutwell, Beaver, & Barnes, 2012;Krueger, Moffitt, Caspi, Bleske, & Silva, 1998;Savard, Brassard, Lussier, & Sabourin, 2015). To our knowledge, only two studies to date have looked at all three Dark Triad traits together.…”