I understand that the Church of Jesus Christ of Latter Day Saints (popularly known as Mormons) teaches that God the Father has a wife and we thus have a divine Mother as well as Heavenly Father. I also understand that unlike most other Christian denominations they do not accept the doctrine of the Trinity, the three in one God, but consider God the Father (whom they sometimes call Elohim), Jesus and the Holy Spirit to be separate beings, thus at least from an outsiders point of view making them polytheists.
In the realm of theory, these are enormous differences from the official teachings of most Christian denominations. However, I am interested in whether they make a practical difference to how Mormons/Latter Day Saints live their lives or their answers to ethical questions.
I asked this question on another internet forum (Quora) that did not allow me to give so much detail in my question. Some LDS members replied saying things like 'It makes a difference to me to know that the Holy Spirit listens to my prayers', which I am sure are important to them in their faith but did not really answer my question as Protestants, Roman Catholics and members of other branches of Christianity would say the same.
Some said that while the Mormons beliefs on these matters were important as doctrine, they did not make much difference to how they lived their lives.
One person said that believing that God the Father is himself married to a wife suggested that male/female is the proper form of marriage, and hence same sex marriage is wrong.