"A couple of straight atheists can get married in a tank full of dolphins..." -- Everyone's favorite sex columnist Dan Savage writes brilliantly in Salon about what defines a marriage these days, which is, maybe, not very much.  With religion, children, and even monogamy no longer compulsory for wedded bliss, he pokes holes in the pro-marriage arguments of both sides of the same-sex marriage debate.  (Watch the ad to read the whole thing.)