I worked for a community-based substance abuse prevention agency and so did my son, Jason. Jason knew the dangers. We believed that he was not using drugs—we talked about it often. I was so convinced that he was not using that it became a sort of joke between us—as he would leave home at the end of a weekend, I would frequently say, “Jason, don’t do drugs.” “I know, Mom,” he would say, “I won’t.” But he did.