Couples can be of the opposite sex or of the same sex” (Statistics Canada, 2012)

Couples can be of the opposite sex or of the same sex” (Statistics Canada, 2012)

The numbers drop for less traditional structures: a single mother and children (55%), a single father and children (54%), grandparents raising children (50%), common-law or married couples without children (46%), gay male couples with children (45%) (Postmedia News, 2010)

Although romantic love is often characterized as an involuntary force that sweeps people away, mate selection nevertheless involves an implicit or explicit cost/benefit analysis that affects who falls in love with whom.