Parents know their children better than anyone. They know what s/he is like, and in what environment s/he will grow up and often live. The state is not infallible and its decisions are not purely objective. When children are not adequately mature for sex education, parents must have the ability to make the decision on their behalf to withhold information that could be potentially damaging to their future development. As to homophobic or bigoted families, such views are considered to be socially acceptable insofar as people have the right to express such views. This does not, however, give parents license to abuse their children if they have alternative sexual preferences. Sex education is not necessary to ensure against abuse, that is the purview of law enforcement.