1. To educate them about sex. (Not a solid argument because learning by doing isn't necessary.)

I think this insistent belief of yours is very wrong, Rascal. Can a doctor learn to be a good physician by simply reading and memorizing information from a textbook? No, that's why they are required to take residencies before receiving their full accreditation. Can someone who reads how to fly a plane get a pilot's license and learn to fly competently without ever getting into a cockpit with a trainer? No, that's why hands-on training is necessary. Do we get a driver's license only after reading the book in preparation for taking the written test? No, we only get a permit if we pass the written test, because we can't get a full license and therefore full driving privileges without getting behind the wheel several times; and all of the above despite the risks entailed. This is just common sense.

I can't weigh in on being a dr. however I have driven a car and flown a plane both are very complicated to learn. sex however is not so complicated.