Generally, when we as a society make laws, we should be able to point to damage or harm that will come from the action or behavior that we are outlawing.
Stealing is illegal, because if it weren't, people would just take our shit. Certain laws cross over into questionable areas, like the prohibition of marijuana, which we all here probably agree that the law is unjust since we can now point to actual evidence, showing low to no harm. This information is important in helping society decide whether to continue this prohibition. If society says, we are right, marijuana is not harmful, then society will decide to lift these restrictions.
Now, why haven't the opposition been able to point to any particular harm that will occur from allowing gays to wed? If you cannot point to any damage or harm, then it should not be restricted.
Anyone here that is opposed to same-sex marriage, can you please provide a reason for restricting it?
Please, let's stay away from religious reasons like homosexuals are sinners, or appeals to tradition. Please point out, real, actual damage to others that will occur from allowing Fred and Bob to get the same legal rights as a married couple as Janet and Ted.