Non religious reasons to oppose gay marriage

[nehalem256]

I was talking about teen pregnancy, not out of wedlock births. There remains no correlation there whatsoever. (you are correct that teen pregnancy is more a condition of poverty, but of course that has nothing to do with the liberal or conservative values of a region)

Technically teen pregnancy does not either. As long as they are married it would be ok by any religion.

A definitional part of marriage, no, but it's evidence as to how what we're willing to accept as marriage varies with time as cultural norms vary.

And marrying an 18 year old girl vs. a 12 year old girl is fundamentally different how?