Gay marriage. Heterosexual marriage in church is modern innovation

Re- the debate on Gay marriage. Heterosexual marriage in church is a comparatively modern innovation. According to a historian friend of mine marriage was mainly a business arrangement for dynastic and property reasons. People in medieval Britain didn't get married in Church: only the rich with property involved the church and a religious ceremony, but even then they had the ceremony  outside the actual church (a priest would marry them at the church door). Just thought you'd like to know!