We had a lesson about the Law of Chastity in High Priests Group a couple of years ago (yeah, with men who generally are grandfathers), and the teacher (whom I love) started the lesson with a joke he heard personally at a conference in Utah for LDS marriage counselors. Vaughn J. Featherstone was the one who told it, so I'm just passing on the words of a General Authority (*grin*):
A man walked up to his wife with his hands cupped in front of him and said, "If you can guess what's in my hands, we'll have sex." She smiled and responded, "an elephant." He opened his hands, revealing nothing there, and said, "Close enough!!"
The teacher then talked about "the elephant in the room" with regard to the Law of Chastity - that almost everyone wants sex, and that it's a WONDERFUL thing. When we focus only on the "bad" use, we end up re-enforcing the idea that sex itself is vulgar or "dirty" or shameful in some way - which feeds right into many pornographic presentations and other harmful depictions.
When homosexuality was discussed, one of the men in the group immediately said, "We have to be VERY careful we don't end up judging people when we talk about this." I mentioned how glad I am that the Church has moved away from the mistaken idea that homosexual attraction is "unnatural" - that we are beginning to realize how complicated human sexuality is and write policy accordingly.
It was a great lesson.
We talked about the Law of Chastity in a High Council training later that week, largely because one of the Stake Presidency members attended the High Priests Group class and was impressed by the lesson. Near the end, when we talked about how to teach the Law of Chastity to our children, youth and young adults, I mentioned that we simply MUST start by making sure they know sex is great (generally) and that we like it. I mentioned that all of my children know my wife and I have sex and that we enjoy it greatly - and it is from that foundation that we teach about it and why we believe in limiting it to marriage. Some of the people there were a bit shocked, I think, that I was so open about it, but not one of them objected in any way - and I was the youngest person there.