DL5, I understand what you mean. He’s a young man out with the lads, but he needs to know when to switch off.
As I said before, and the recovering addicts here will tell you, the alcohol is the trigger.
Since my son admitted he took cocaine and had an alcohol problem , we never ever drank in front of him.
Everyone is different , but only some will get addiction and thats a nightmare.
Read the other threads too it may help you more.
Lx