The thing I found most fascinating about the 1965 pamphlet was how different it is from the pamphlet I was told to carry around in my wallet when I was a teenager. Some of the things were the same, of course: no dating before age 16, a high value on sexual purity, etc. But there is much that is different. For example, my pamphlet didn't tell women they had to wear skirts or dresses in public like the 1965 version does, nor did I have to wear 'trousers' in public because shorts weren't allowed.
This is evidence, albeit minor, that the Mormon Church does change. Whether you believe it changes because of external, societal pressure or you believe it changes because of divine inspiration from God...it changes. And the Church has changed it's position on issues as minor as trousers versus shorts for men and as major as polygamy and institutionalized racism.
For example, from the Kirtland era (circa 1830s) to the 1890s, a relatively significant portion of Mormon men had a plurality of wives. Because this wasn't an uncommon practice, and because it was strange and even repulsive to many non-Mormons, the Mormon Church was persecuted for it - both criminally and in the courts and legislatures. Finally, all of the Church property was seized by the U.S. government because the Church wouldn't abide by new laws that criminalized polygamy. At about this time, the man who was president and prophet of the Church, Wilford Woodruff, received what is known as the Manifesto - a revelation from God letting the Church out of the problematic doctrine of plural marriage. A convenient policy change due to social and legal pressure? Maybe. Or maybe it was a conveniently timed revelation from God. Either way, it led to major change in Mormon beliefs and behavior.
The same thing happened in 1978, when the leader of the Church at that time, Spencer W. Kimball, decided to allow Black Mormons to have all of the same rights as White, Asian, Hispanic, and Latino Mormons. Until this date, Black Mormon men could not hold the priesthood, Black Mormons could not enter Mormon Temples and could not be married in Mormon "sealing ceremony." Again, perhaps it was a divine revelation from Jesus Christ to Kimball. Or maybe it was a (late) capitulation to social pressures. The point, still, is that it led to major change in Mormon beliefs and behavior - in fact, change that some leaders of the Church, sustained as prophets, seers, and revelators by Mormons, implied would never happen.
Things in Mormondom do change. Women can wear pants in public. Men can wear shorts. Black people are no longer (officially) marginalized. Men can only have one wife at a time. So, I think, that means there's hope. Maybe one day, those pants-wearing women will have the same power and authority as those shorts-wearing men. Maybe one day, gay people will no longer be (officially) marginalized. The change will be announced as a result of divine inspiration - maybe it really will be, or maybe it will simply be a recognition of changing social values and relevancy. The purported reason won't matter nearly as much as the actual change.
The thought makes a lot of Mormon people's heads spin, I know. I've watched it happen. I've heard them say, over and over again, that it will never, ever happen. I think they might be wrong - I really hope they are. And to help them prepare for those changes, I'll end with a quote by Bruce R. McConkie (one of those prophets, seers, and revelators). He's talking about the difficulty some Mormons had with the change allowing Black Mormons full rights. And I think in this instance, his words really might be prophetic:
There are statements in our literature by the early Brethren that we have interpreted to mean that the Negroes [homosexuals] would not receive the priesthood [or full rights] in mortality. I have said the same things, and people write me letters and say, "You said such and such, and how is it now that we do such and such?" All I can say is that it is time disbelieving people repented and got in line and believed in a living, modern prophet. Forget everything that I have said, or what President Brigham Young or George Q. Cannon or [Boyd K. Packer or] whoever has said in days past that is contrary to the present revelation. We spoke with a limited understanding and without the light and knowledge that now has come into the world.
It doesn't make a particle of difference what anybody ever said about the Negro [homosexual] matter before the first day of June 1978 [soon...please...soon]. It is a new day and a new arrangement, and the Lord has now given the revelation that sheds light out into the world on this subject. As to any slivers of light or any particles of darkness of the past, we forget about them. We now do what meridian Israel did when the Lord said the gospel should go to the Gentiles. We forget all the statements that limited the gospel to the house of Israel, and we start going to the Gentiles [and the gays].