Egad! Come on people, you can do better than that! I've been out of this forum for several weeks, and come back for a brief visit. Darn it, I have to post!
Big non-religious reason: Children. Legalize gay marriage = legalize gay adoption. Also increased pressure on doctors to aid in conception (involving a 3rd party) so that gay couples can produce babies. This says to the world, fathers OR mothers are not important. It says two mothers = a mom & dad. It says two fathers = a mom & dad. It says gender in parents is irrelevent to the children.
You say that like you expect everyone to share your view that two mothers or two fathers is a bad thing or that legalizing gay adoption is bad. I would disagree with everything here except your last sentence. That's the point, gender in parents is irrelevant to the children. That part is true, and you should accept it.
Who here really believes that a dad (male parent) is unimportant? Or that a mother (female parent) is unimportant? I don't care how many women are in a child's life, that child needs a father. No woman can be a father. No man can be a mother.
Why are they so important? Which is more important to you: having two loving parents who want the best for their children or having a mother and a father? Personally, I'd take the first option every time, even if it was two people of the same gender. Is an abusive drunk of a father more important than a woman who loves her child and treats them correctly?
Let gay couples adopt children who have no other options. Of course a loving gay home is better than no home. But don't bring a child into the world to deprive it of a father or a mother ON PURPOSE. It's just not fair to the child.
There, I'm leaving now. I'll be sure to lock up on my way out.
You do realize that children of gay parents have a very high rate of happiness and being well-adjusted, right? Higher than children of straight parents. Again, I know you expect to throw this sort of thing out there and have everyone go "Oh yeah, you're right", but you're wrong. You seem to think that the gender of the parents has some amazing effect on the children, and you are wrong.
Thanks for stopping by, and now maybe we can get back to the topic of the thread,
legitimate non-religious reasons against gay marriage.