As a Mormon bisexual man I live in the "other circumstances" mentioned in The Family: A Proclamation to the World where "Death, disability or other circumstances may necessitate individual adaptation."
"And Moroni went to the city of Mulek with Lehi, and took command of the city and gave it unto Lehi. Now behold, this Lehi was a man who had been with Moroni in the more part of all his battles; and he was a man like unto Moroni, and they rejoiced in each other’s safety; yea, they were beloved by each other, and also beloved by all the people of Nephi." (Alma 53:2)
We are not told exactly how they rejoiced in their love, but Moroni gave Lehi a city, not a small gift. Nonetheless it is clear that these two men cared a great deal for each other, had been together a great deal in battle, were grateful for their mutual safety and joyful to be reunited with their respective "beloved."
That they we also beloved by all the people of Nephi may suggest that their affection for each other was not anything out of the ordinary, not something that was hidden from others. The scripture also contains the reference that "this Lehi...was a man like unto Moroni..." Yes, they may have been Kinsey Ones who were just dear friends (as are many straight men bonding as brothers together in war, church callings, or servitude) but they could also have been Kinsey Sixes or Threes and the narrative holds together at least as well or much, much better depending on your view. What do you think?