Quote Originally Posted by mraynrand View Post
The vast majority of male-female relationships are entered into with the understanding that marriage and reproduction are desired and likely outcomes - that is and has been an essential biological and cultural fact since before history began. It is only in the last 40-50 years that anyone would have considered that a similar relationship would be attempted by members (ostensibly) of the same sex.
Not quite. Same sex unions were pretty common in non-European and pre-Christian cultures, including Greece, Rome, China and Mesopotamia. There are even same-sex union traditions in early Christianity. The strict equation of marriage with one man-one woman came later, around the 4th century AD.