[Jack of all Trades]

...“When he was using marijuana as a teen I would have never dreamed he would have touched heroin,”...

And when he was sneaking alcohol out of your liquor cabinet before that you probably weren't paying attention. Early consumption of alcohol is the biggest preventable factor in substance addiction. Any intoxicant for that matter, but alcohol is by far the most common.

[TurboZamboni]

The answer is to ban everything and orifice exams for all!

sarcasm