Right, so we should hide the facts of sex from them until they're old enough to marry, so they won't have any idea what that thing is between their new spouse's legs.
I agree with this parent:
At least one parent said he did not believe the material was inappropriate.
"This is biology, it's anatomy, it's human sexuality," said Jon Klibonoff, who has a child at the school but not in the class. "They're in puberty. They're aware of it on one level or another."