So if that was formed for thousands of years what were the male bonding ceremonies throughout the churches in the middle east until the thirteenth century for? Marriage was in the beginning for power and property for kings - women had no say and love had nothing to do with it. For thousands of years women were subordinate to their husbands - so is that the definition of marriage you are referring to?
But more important when talking about rights? While you may not like gay marriage would you prevent gays from marrying? If so why do you think more equal and entitled to more rights than they?