I don’t use drugs nor alcohol, but I just turned 18 and I noticed that a lot of people younger than me (high school age so 14-17 even) use alcohol and sometimes drugs from siblings, older friends, etc.
Did you do that when you were younger than me? I don’t plan on doing so anyway.
I’ve had a couple of parent-sanctioned sips of beer once every few years as a teenager, but never got drunk nor smoked any weed for the first time until age 20.