I think that we can't discriminate about how we love. So if we have clear this right, it's obvious that people with the same sex can get married.
I grow up with a family that teached me what's wrong and what's good, in that way they teached me that people of the same sex can't get married because that isn't naturally, why people who love people of the same sex are not natural? Well, in the same way, black people can't have rights. That's a thinking about hundred years ago. Homosexual people born like that and black people too. So because people who don't continues stupid rules and "natural" stereotypes of the society have fewer rights? I don't think so.