Why do we censor in Schools?

The only way, thus, is to teach all of these repressed material to it's full extent, rather than censor it in discussions. Unfortunately, this is where I think the schools fail at.

I hope you misused your words. Because I wouldn't want to watch a person take a horse from its behind, and that's what "full extent" could potentially cover. You're proposing not only removing restriction on access, but actually *teaching* it? >.> I know the example may be a bit extreme, but that is what "full extent" includes.