That was a joke. The Church of Jesus Christ of Latter-day Saints does not believe marriage is between a man and several women. There were and apparently still are folks who call(ed) themselves Mormons who have thought polygamy was a peachy, even divinely-directed practice. But the official Mormon Church, which is pouring money into California to bolster Proposition 8, does not. Apparently, they got rid of multiple wives when they realized that meant multiple in-laws.