As far as I see it, the only valid argument that a person could have against same-sex marriage is that under definition 'marriage' is between a man and a woman, so same-sex marriage is impossible. However, the law is created in the first place to reflect society's values and opinions, which are obviously changing on this subject, so in the end there really is no valid argument against it. And as for people 'getting bullied for have 2 dads or 2 mums', I guess it depends on where you live, but nothing like that would ever happen where I live in Sydney. I have a few friends who's parents have re-married the same sex or they've been adopted, and we love them and their parents just the same. A persons sexuality shouldn't even enter the equation as far as I'm concerned.