“…Homogamy has been reported for numerous characteristics, such as physical attractiveness, attachment style, political and religious attitudes, socioeconomic background, level of education and IQ (Klohnen & Luo, 2003;Luo & Klohnen, 2005), and personality characteristics such as extraversion, agreeableness, and openness to experience (e.g., Barelds & Dijkstra, 2007;Botwin, Buss, & Shackelford, 1997;Dijkstra & Barelds, 2008;McCrae et al, 2008;Rammstedt & Schupp, 2008). In contrast, support for the ‗complementarity hypothesis' is much scarcer.…”