Certain things must be done at weddings.
Okay, so that's not entirely true. Some people dispense with the cake, the garter, the tuxes -- and even the vows. I heard about this couple who got married by a sherpa while wearing bikini briefs (the couple, not the sherpa); they sang folk songs and ate vegetarian chili, and that was pretty much that.
Call us traditionalists, but we hewed closer to the norm.