Hi, I know its horrible seeing someone you care about go through something like this, Im sure that alot of people who sh say that while at the time its a release or makes them happy even just for a second they would rather do without it.
Just to answer your original question, from my point of view, I think it is possible to get addicted. Sometimes just the feeling of sh can be something that people will do over and over. i admit that in the past (and sometimes even now bt less frequent) I have felt like I have "needed" it but I think in a way I was also addicted to the routine and the power over my tools and things if that makes sense. xx