First of all, I do not agree with Mark. From everything he had been through, he saw both his drunk parents kill each other when he was only 9 years old. On another hand, his opinion might change if we consider how M&M’s life have become. He is only 13 years old and because of all the insanities that his own father told him he was, he decided to run away at a young age. Cathy even had a suspicion on him using harder drugs and knowing how easy he is to influence, he wouldn’t be able to overcome any problems alone. At 13 also, he used to be his little brothers and sisters role model since he was the one babysitting them. He had bigger responsabilies when he’s still a kid and not being able to express the way he would like to be, he decided to go to the hippie house.