Men (but not women) tend to be more opposed to same-sex marriage after being led to believe that weddings are cheap, according to new research published in the Archives of Sexual Behavior. Surprisingly, this effect remained even after controlling for the men’s sexual orientation. The findings provide further support to the notion that one’s perceptions of the local mating market can influence sociopolitical attitudes. The new study also explored whether widespread promiscuity cheapened the “value” of sexual relationships. In particular, the study’s authors examined how perceptions of promiscui…