It's mind boggling. My xagf came from a background of addiction that resulted in suicide of her step mother. Her sister is an addict in prison. Her step brother is an addict, and get brother is a hardcore abuser. She's seen the damage heroin and meth cause. First hand watching it rip apart her family.
Yet she went down the road willingly at age 37.
I come from a background of addiction. My mother was a nasty alcoholic, my brother and sister both married addicts, resulting in one suicide of my sister in law. Both my brother and I have abused hard drugs for a length of time, but stopped of our own accord.
I just don't get it.