Can you share with us your definition of substance abuse? What’s the difference between substance abuse and addiction?
How much do you know about marijuana[ˌmærə’wɑːnə]/cannabis[‘kænəbɪs] ? some people believe that smoking marijuana should be legalized, what’s your idea? （剧情参考：S01E09 21:22）
Follow up question：Do you think Rex deserves to be splashed with his son’s urine, why?