There’s probably not a single parent in the western world who’s missed the fact that it’s challenging to raise a drug-free kid to adulthood. The environment makes it hard, with so many drugs on the illicit market and new distribution methods making it so much easier to acquire them. And kids themselves make it so very hard simply because they lie about their drug use.
Every young person who yields to temptation and reaches for drugs or alcohol for the first time has their own reasons. It could make them feel grown-up or more adventurous. Maybe they feel like their own life is boring or they resent the restrictions that school, teachers and parents place on them so they’d love to feel rebellious. Maybe they are socially uncomfortable or lack confidence and think drinking or drugs will help them relax. There are so many reasons. The key point here is that once a teen or young adult yields that first time, they now have a secret to keep.
https://www.narconon.org/blog/lies-teens-and-young-adults-tell-their-parents-about-drugs.html