Tax laws discriminate against same-sex couples
USA Today takes a great look at this overlooked issue: "Take two couples where one partner has a taxable income of $20,000 and the other makes $40,000. If they can file their federal taxes jointly, the tax bill would be $8,217.50. Filing separately, the combined bill would be $9,032.50 - more than $800 higher."
The federal government does not recognize same-sex marriages even from legally-married Massachusetts couples, which can lead to another complication: filing state taxes jointly but federal taxes individually.
Britney and K-Fed could file taxes jointly and save money, but a gay couple that's lived together for 30 years and adopted children can't. That's wrong, and it's also stupid.
Some good links: the best argument for gay marriage comes from a Republican state congressman from Wyoming. If you haven't seen it before, here are 12 (very sarcastic) reasons that gay marriage will ruin America.