Parents should teach their children what they believe, because they are too stupid to form reasonable opinions on their own.
A brain that still thinks it's a good idea to pick one's nose and eat it is not capable of philosophy. The reason we aren't booted from the nest as soon as we can walk is because we aren't fully developed between the ears until age 22 or so.
If you don't believe me, just read the rest of this thread. Nobody thinks about this shit past age 25, they're too busy making a living.