my father just went through this rehab for his drug addiction, the un unmentionables.. and he has every chip you can get besides the 20year+ chips. Hes been clean now for almost two years and so has his new wife. had 3 children and is working strong and hard, everyone else in our family does it and he still manages to stay away from it. I think its like he says you just need to tell yourself never again over and over. He destroyed our relationship over it, and it is slowly coming around, i still cant look at him though without questioning.. but im waiting for the day when i can look at him and know hes not out...good luck, but just remember if it dose not work its not your fault because in the end its their decision just have positive thoughts and know youv done your part..and for the mary jane, that could help if he wants its to..