Other than "My Religion looks down on it" or "Ew" what possible reason is there to be against Gay Marriage?

I honestly don't know why people dislike it so much. like I feel the same as you, I am moderate, think some things are right for each side. When people say gays shouldn't get married cause there will be less kids well that is ridiculous because whether they are married or not it won't make a difference if they adopt or do what ever they want to do. being married is just a commitment therefore probably making more gays want to have kids in some way.