The Bible is full of passages talking about how sex between same sex people is sinful, i.e. homosexual sex is sinful.
The Bible also specifically says that a man and a woman form a union.
I don't know the passages, I am sure others do.
I think someone should find those passages and send them to this guy, preferably hundreds of people at the same time, and have them all claim the $5,000.
I am not a Biblical scholar, but I am not sure the Bible talks about marriage at all. I am not sure what the Greek word is for union, but the Latin word is unus, which means one. It wasn't until middle English that union came to mean marriage. What will be interesting is to find out what it actually says in Greek. But, as far as I know the Bible doesn't talk about marriage specifically at all.
Romans - Chapter 1 - pretty much says "men with men is an unnatural state" - which doesn't take a Rhodes Scholar to figure out - a "natural state is a man and a woman". If that's the "natural" state - then marriage would be only between a man and a woman.
Since I don't live in Alabama - and this is a state representative - I doubt he would receive my information. So .. look up Romans 1 and let him have it.
And marriage is full of women talking about how sex, any sex, is totally out of the question. ;-)