What's obvious is you're completely nuts and have a very poor grasp of the sciences.<quoted text>
Think about it moron. What happens a when man & woman have sexual intercourse (assuming they use no protection)? It's obvious the Bible's definition of marriage is connected to Survival of the Fittest theory of procreation mentioned in science text books. Are you saying your anti-biology?
Science and biology say that gay sex is very common in the animal kingdom. It is a completely common and natural variation. I don't expect you to be able to grasp that though.
And like Joe says, it's not a requirement of marriage. If infertile couples can marry and old people and people who plan to never ever have kids can marry, then you have no argument to deny homosexuals.