The perpetual question...why?  Two young adults gone too soon. They knew heroin was a dead end and yet they started.  Dead end...destroys relationships, drains finances, interrupts and takes over a persons life plus exceptionally high risk to OD and die.  They know ALL of this and yet start anyway. It makes no sense. When asked why, users most commonly say, "because it makes me feel good."  or.."It's hard to explain, sure I was frustrated, angry and depressed a lot, I know it was bad but I just wanted to feel good." - Did you seek help for your depression? "No."  

Maybe it falls into the genetic mix of being prone to addiction or a "need"  to be drawn to it. Entering into therapy as a part of rehab is to late one has to wonder.  The logic of it all is to capture someone on the brink of deciding to begin "using" and instead begin therapy. This a tough nut to crack to be sure.