Just making an off-topic correction. The Latter-Day Saints Church (Mormons) do not allow polygamy or polyamory. It became grounds for excommunication in 1890. On the contrary, Mormons have probably one of the strictest policies on marriage of most Christian religions.

There are sects in Utah (mainly) who practice polygamy and borrow some of their beliefs from the LDS church, but they are in no way recognized, affiliated, or accepted by the Church itself.

Sorry for the tangent, but this mis-conception is one of my biggest pet-peeves.