According to Nate Silver, divorce rates in the fudge-packer states have "decrease by an average of 8 percent between 2003 and 2008."
Meanwhile, states that enacted gay-marriage bans "saw their divorce rates rise by about 1 percent over the same period."
I can't say I'm surprised. Not that I'm claiming gay marriage is actually "helping" straight marriage in some way - it could be that communities that actually value marriage, and thus experience a lower divorce rate, are also more likely to accept gay marriage as part of that equation. Still, it's also possible that gays, who aren't likely to marry until all the kinks, shall we say, are ironed out of their relationships, are also more likely to stay hitched, thus lowering the divorce rate somewhat for everyone.
And just btw, "In Massachusetts, which legalized gay marriage in 2004, the divorce rate has declined by 21 percent and is the lowest in the country by some margin."
So hooray for us. And tell that to your priest next time you see him stocking up on anal lube at Costco.