I don't know very much about this documentary, but it looks like a really good one.
People always get all up in arms whenever it comes to discussing sexuality with children. The general theme is that kids are too young (especially children 10 and under) and don't need to be hearing such things at such an early age. I think this sentence needs to be specified, because I agree with it on a certain level.
Yes, I agree that children should not be exposed to all of the various aspects of sexual activity until they are an appropriate age. However, certain content IS appropriate. Children understand the concept of a mother and a father (a man and woman living together) at a very early age. They can also be taught to understand that a man and a man or a woman and a woman living together is the same thing. People accuse this idea as embedding the concept of sex within the minds of children, but it wouldn't do that at all. Children don't think about a mother and a father having sex; they don't understand it. It can be just as simply explained that Tommy has 2 dads, Suzie has 2 moms, and Billy has a mom and a dad. If you explain it like that, it puts everything on the same playing field: sex-free. The children don't have to find out what the parents, of any of those examples, are doing behind closed doors.
It's NOT that hard, and this video is a good example of the efforts being made in a positive direction.