Regretfully, little lessons like this seem to be necessary.
I know, I know: this sort of thing shouldn’t have to be taught by outsiders… but apparently you can’t expect the parents to teach this stuff to their own kids these days, and if we expect them to grow up to be anything like responsible adults, there’s kind of an obligation to make sure of that. There’s far too much ignorance and just plain bad information out there on the subject already, and it won’t get better on its own…