For the same reason there are people that thinking pushing abstinence-only sex education is a good idea, and I'm sure it's pretty much the same people pulling this crap with their kids.
Yikes. That seems like such a terrible, oppressive idea that is pretty much sure to make a child rebel. Arm them with info, and they can make an actual decision. :no:
Two words on abstinence-only ed: Bristol Palin