Jan 30, 2012. In counterculture circles, the practice of polyamory, or open partnerships, is supposed to be having some sort of moment. All of which explains why, in response to the argument by conservatives like Rick Santorum and Antonin Scalia that gay marriage could be a slippery slope leading to polygamy, some. LDS Leaders Still Believe There Will Be Polygamy in Heaven. By Sandra Tanner. Plural marriage was first introduced…