Not that I have anything against Masons but Mormonism sounds a lot like the Masons when one considers the secret rituals. But of course, the Masonic organization is not considered a religion and maybe neither should Mormonism.
And one has to point out that being encouraged much less permitted to have and bed a serial string of younger and younger wives also lent a certain attraction to most male acolytes. It is still a practice in Islam, although the "legal limit" is four (a limit overcome by having "temporary" wives and concubines of any number).